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Derek A Epp

Biographic Data

ID1223784
NAMEDerek A Epp
GIVEN NAMESDerek A
FAMILY NAMEEpp
SIGNATUREEPP D A
AFFILIATIONSThe University of Texas at Austin
ORCID0000-0002-9881-4752
VERIFIEDYes
TOTAL WORKS28
TOTAL CITATIONS206
AUTHOR COUNT28
EDITOR COUNT0
FIRST PUBLICATION YEAR2014
LATEST PUBLICATION YEAR2026
H-INDEX9
  • Benchmarking in public updating of economic perceptions

    Open Access•Derek A Epp, Christopher Wlezien•ARTICLE•Political Science Research and…•2026

    How do people respond to new information about social conditions? For example, does an improvement always lead people to say things are “better”? We argue that people update their views differently depending on whether preexisting perceptions are positive or negative, meaning equivalent changes in conditions can elicit different public reactions. To test this possibility, we update a classic model of aggregate public responsiveness to economic co…

  • Is the populist Robin Hood a fairy tale? Parliamentary attention to social welfare

    Enrico Borghetto, Luca Manucci et al.•ARTICLE•Journal of European Public Policy•2026•Cited by: 1•References: 113

    In the aftermath of the Great Recession, populist parties rose to prominence across Europe, campaigning on the promise to do something about growing economic inequality by funding social welfare programs. We investigate if the pro-welfare reputation of European populist parties, either on the left or the right, is well deserved. We draw on a dataset of questions asked by members of parliament from nine European democracies over three decades. We …

  • Measuring disparities to emergency medicine with 200 million voter records: The case of rural hospital closures

    Open Access•Michael E Shepherd, Christian Cox et al.•ARTICLE•The Journal of Rural Health•2025

    PURPOSE: Distance to health service providers is related to increased mortality risk and decreased service utilization. However, existing studies of distance to services often rely either on aggregated measures of distance or small samples of survey respondents. Nationwide individual data from 200 million Americans are used to assess various demographic groups' distances to open acute hospitals. METHODS: We gathered the exact location of every op…

  • Policing Socio-Geographic Boundaries and Inequality

    Open Access•Allison Verrilli, Marcel F Roman et al.•ARTICLE•Perspectives on Politics•2025•References: 14

    How do patterns of racial inequality shape policing behavior in the United States? We investigate whether police engage in boundary maintenance at geographic points of racial difference. Critical race scholars suggest that police explicitly serve this function. Yet empirical studies are rare and limited to snapshots of a single city, making it hard to distinguish practices employed across departments from agency- and officer-level idiosyncrasies.…

  • The political economy of fiscal responsibility

    Open Access•Christian Cox, Derek A Epp et al.•ARTICLE•Public Choice•2025•References: 28

  • The George Floyd Effect: How Protests and Public Scrutiny Changed Police Behavior

    Open Access•Marcel F Roman, Klara Fredriksson et al.•ARTICLE•Perspectives on Politics•2025•Cited by: 1•References: 57

    The murder of George Floyd in May 2020 sparked a wave of Black Lives Matter protests in many cities throughout the United States. Protesters’ demands ranged from constraints on police use of force to defunding and disbanding the police altogether. These have led some to worry about the possibility of a “Ferguson Effect,” where police withdraw from policing, and in particular discretionary stops and searches, with deleterious consequences for crim…

  • Access to Healthcare and Voting: The Case of Hospital Closures in Rural America

    Open Access•Christian Cox, Derek A Epp et al.•ARTICLE•American Political Science Review•2025•Cited by: 1•References: 81

    We investigate how hardships affect rural politics, considering the case of hospital closures. In the last two decades, more than two hundred rural hospitals have closed their doors or drastically reduced their services. Drawing from resource models of voting, our hypothesis is that personal- and community-level deprivations brought about by hospital closures should reduce election turnout. Empirical tests pair geographic information on the locat…

  • When Bad News Becomes Routine: Slowly-Developing Problems Moderate Government Responsiveness

    Open Access•Derek A Epp, Herschel F Thomas•ARTICLE•Political Research Quarterly•2023•Cited by: 3•References: 42

    Established theories of the policy process recognize the challenges governments face in processing information. We examine how the ways in which public problems develop over time condition subsequent policy actions. We contend that policymakers will become routinized to and consequently under-respond to the accumulating signals of slowly-developing problems (i.e., those featuring long runs of relatively small changes). Event history analyses leve…

  • At the intersection: Race, gender, and discretion in police traffic stop outcomes

    Open Access•Kevin Roach, F R Baumgartner et al.•ARTICLE•The Journal of Race Ethnicity and…•2022

    Racial disparities in traffic stop outcomes are widespread and well documented. Less well understood is how racial disparities may be amplified or muted in different contexts. Here we focus on one such situational factor: whether the initial traffic stop was related to a traffic safety violation or a (broadly defined) investigatory purpose. This is a salient contextual characteristic as stop type relates to different levels of assumed discretion …

  • Contact and Context: How Municipal Traffic Stops Shape Citizen Character

    Allison P Anoll, Derek A Epp et al.•ARTICLE•The Journal of Politics•2022•Cited by: 14•References: 25

    Previous research shows that how the state conducts itself influences citizen attitudes and behaviors through direct and proximal contact; we show the actions of state agents ripple out even further. Joining bureaucratic data on a publicly observable state behavior—racial disparities in investigatory traffic stops—with survey data, this article shows that residing in a place with extreme racial disparities in traffic stops is associated with depr…

  • Does partisanship explain spending patterns in congressional bill proposals

    Open Access•Laura Quaglia, Laura De Castro Quaglia et al.•ARTICLE•Party Politics•2022•Cited by: 2•References: 40

    We investigate the motivations driving members of the US Congress to introduce bills that require new federal spending, testing a classic “party matters” hypothesis that spending is motivated by partisanship with Democrats spending more on social programs and Republicans more on defense and social order. To test this hypothesis, we introduce a new dataset that codes Congressional Budget Office reports, allowing us to link cost estimates to over 7…

  • Better for everyone: Black descriptive representation and police traffic stops

    L Christiani, K Shoub et al.•ARTICLE•Politics Groups and Identities•2021•Cited by: 6•References: 23

    Racial disparities in citizen interactions with police are ubiquitous concerns in American communities. What difference does electoral representation make? We demonstrate that black descriptive representation in local government affects police activity and scrutiny in a given community. We use a new dataset comprised of over 79 municipal police departments spanning 6 states, based on tens of millions of individual-level traffic stops. In cities a…

  • Legislative agendas during periods of inequality: Evidence from Europe and the United States

    Derek A Epp, Enrico Borghetto•ARTICLE•Journal of European Public Policy•2021•Cited by: 5•References: 36

    This article investigates the relationship between economic inequality and legislative agendas. It argues that rising inequality makes agenda setting especially vulnerable to the influence of economic elites, and that elites use their influence to keep redistributive policies from receiving governmental attention. Empirical tests use data on public laws and bills introduced in the legislatures of five European countries between 1981 and 2012, and…

  • Inequality, Media Frames, and Public Support for Welfare

    Open Access•Derek A Epp, Jay T Jennings et al.•ARTICLE•Public Opinion Quarterly•2021•Cited by: 9•References: 53

    The political preferences of those with high and low incomes are highly correlated, and both groups become less supportive of redistributive spending as economic inequality increases. This article looks for a source of these interincome group correlations by examining trends in media coverage. We find that during periods of higher inequality, media coverage is more likely to focus on the personal characteristics of welfare recipients rather than …

  • Fines, Fees, Forfeitures, and Disparities: A Link Between Municipal Reliance on Fines and Racial Disparities in Policing

    Open Access•K Shoub, L Christiani et al.•ARTICLE•Policy Studies Journal•2021•Cited by: 16•References: 36

    We investigate a possible linkage between municipal reliance on fines, fees, and forfeitures as a revenue source and policing behavior. With a dataset of four million traffic stops made by North Carolina municipalities, we demonstrate that a regular reliance on fines, fees, and forfeitures has powerful, predictable, and racially distinct impacts on black and white drivers, and that fiscal stress exacerbates these differences. A greater regular re…

  • Race, Place, and Context: The Persistence of Race Effects in Traffic Stop Outcomes in the Face of Situational, Demographic, and Political Controls

    Open Access•K Shoub, Derek A Epp et al.•ARTICLE•The Journal of Race Ethnicity and…•2020

    Evidence that racial minorities are targeted for searches during police traffic stops is widespread, but observed differences in outcomes following a traffic stop between white drivers and people of color could potentially be due to factors correlated with driver race. Using a unique dataset recording over 5 million traffic stops from 90 municipal police departments, we control for and evaluate alternative explanations for why a driver may be sea…

  • The use and effectiveness of investigative police stops

    Derek A Epp, Macey Erhardt•ARTICLE•Politics Groups and Identities•2020•Cited by: 6•References: 5

    This article asks if investigative police stops (1) help officers find contraband, and (2) serve as a bulwark against violent crime. We focus on the experiences of Fayetteville, North Carolina, which in 2012 mandated that police officers obtain written permission from motorists before conducting searches absent any probable cause. The effect of these mandates was a dramatic reduction in the use of so-called “consent searches.” Using traffic stops…

  • Race, Place, and Context: The Persistence of Race Effects in Traffic Stop Outcomes in the Face of Situational, Demographic, and Political Controls—corrigendum

    Open Access•K Shoub, Derek A Epp et al.•ARTICLE•The Journal of Race Ethnicity and…•2020

  • Democracy, Authoritarianism, and Policy Punctuations

    Open Access•Bryan D Jones, Derek A Epp et al.•ARTICLE•International Review of Public…•2019•Cited by: 17•References: 43

    Do democracies perform better than more autocratic political systems? Most existing literature focuses on single issues, such as maintaining the peace, avoiding famines, or promoting stable economic growth. The key to policy success for all these and other issues is adaptive policymaking in complex, dynamic environments. Relying on theory and empirical tests from policy process studies, we focus on extreme policy punctuations as indicators of mal…

  • The Structure of Policy Change

    Derek A Epp•BOOK•The Structure of Policy Change•2018

    "Government agencies respond to increasingly complex problems and a rapidly changing political environment which creates new priorities, forcing agencies to respond to unanticipated situations, often with little knowledge or preparation, creating instability in the policy making process. Epp argues that agencies vary in the complexity of the problems they face, whether they maintain a level of expertise and capacity to analyze complex problems, a…

  • Suspect Citizens: What 20 Million Traffic Stops Tell Us About Policing and Race

    F R Baumgartner, Derek A Epp et al.•BOOK•Suspect Citizens•2018

    Suspect Citizens offers the most comprehensive look to date at the most common form of police-citizen interactions, the routine traffic stop. Throughout the war on crime, police agencies have used traffic stops to search drivers suspected of carrying contraband. From the beginning, police agencies made it clear that very large numbers of police stops would have to occur before an officer might interdict a significant drug shipment. Unstated in th…

  • The Structure of Policy Change

    Derek A Epp•BOOK•The Structure of Policy Change•2018

  • Policy Agendas and Economic Inequality in American Politics

    Open Access•Derek A Epp•ARTICLE•Political Studies•2018•Cited by: 7•References: 31

    This article investigates the relationship between economic inequality and US congressional agendas. Longstanding insights into the influence of political spending on public policy suggest that money can narrow the scope of policy conflicts. I argue that rising inequality should intensify these negative-agenda forces as wealthy interests gain a political advantage relative to other social groups and use this advantage to protect their socioeconom…

  • Complexity, Capacity, and Budget Punctuations

    Open Access•Derek A Epp, F R Baumgartner•ARTICLE•Policy Studies Journal•2017•Cited by: 33•References: 27

    The budgeting literature has long focused on “institutional friction” as a cause of ubiquitous punctuated equilibrium (PE) findings. A recent wave of scholarship looks to identify specific institutional mechanisms that affect the number of punctuations in policy outputs. We contribute to this growing body of research by focusing on the complexity of the institutional environment surrounding a policy area as well as that of the government as a who…

  • Budgetary change in authoritarian and democratic regimes

    F R Baumgartner, Marcello Carammia et al.•ARTICLE•Journal of European Public Policy•2017•Cited by: 45•References: 26

    We compare patterns of change in budgetary commitments by countries during periods of democracy and authoritarianism. Previous scholarship has focused almost exclusively on democratic governments, finding evidence of punctuated equilibria. Authoritarian regimes may behave differently, both because they may operate with fewer institutional barriers to choice and because they have fewer incentives to gather and respond to policy-relevant informatio…

Next
  • Budgetary change in authoritarian and democratic regimes

    F R Baumgartner, Marcello Carammia et al.•ARTICLE•Journal of European Public Policy•2017•Cited by: 45•References: 26

    We compare patterns of change in budgetary commitments by countries during periods of democracy and authoritarianism. Previous scholarship has focused almost exclusively on democratic governments, finding evidence of punctuated equilibria. Authoritarian regimes may behave differently, both because they may operate with fewer institutional barriers to choice and because they have fewer incentives to gather and respond to policy-relevant informatio…

  • Complexity, Capacity, and Budget Punctuations

    Open Access•Derek A Epp, F R Baumgartner•ARTICLE•Policy Studies Journal•2017•Cited by: 33•References: 27

    The budgeting literature has long focused on “institutional friction” as a cause of ubiquitous punctuated equilibrium (PE) findings. A recent wave of scholarship looks to identify specific institutional mechanisms that affect the number of punctuations in policy outputs. We contribute to this growing body of research by focusing on the complexity of the institutional environment surrounding a policy area as well as that of the government as a who…

  • Democracy, Authoritarianism, and Policy Punctuations

    Open Access•Bryan D Jones, Derek A Epp et al.•ARTICLE•International Review of Public…•2019•Cited by: 17•References: 43

    Do democracies perform better than more autocratic political systems? Most existing literature focuses on single issues, such as maintaining the peace, avoiding famines, or promoting stable economic growth. The key to policy success for all these and other issues is adaptive policymaking in complex, dynamic environments. Relying on theory and empirical tests from policy process studies, we focus on extreme policy punctuations as indicators of mal…

  • Fines, Fees, Forfeitures, and Disparities: A Link Between Municipal Reliance on Fines and Racial Disparities in Policing

    Open Access•K Shoub, L Christiani et al.•ARTICLE•Policy Studies Journal•2021•Cited by: 16•References: 36

    We investigate a possible linkage between municipal reliance on fines, fees, and forfeitures as a revenue source and policing behavior. With a dataset of four million traffic stops made by North Carolina municipalities, we demonstrate that a regular reliance on fines, fees, and forfeitures has powerful, predictable, and racially distinct impacts on black and white drivers, and that fiscal stress exacerbates these differences. A greater regular re…

  • Targeting young men of color for search and arrest during traffic stops: Evidence from North Carolina, 2002–2013

    F R Baumgartner, Derek A Epp et al.•ARTICLE•Politics Groups and Identities•2016•Cited by: 16•References: 2

    North Carolina mandated the first collection of demographic data on all traffic stops during a surge of attention to the phenomenon of “driving while black” in the late 1990s. Based on analysis of over 18 million traffic stops, we show dramatic disparities in the rates at which black drivers, particularly young males, are searched and arrested as compared to similarly situated whites, women, or older drivers. Further, the degree of racial dispari…

  • Contact and Context: How Municipal Traffic Stops Shape Citizen Character

    Allison P Anoll, Derek A Epp et al.•ARTICLE•The Journal of Politics•2022•Cited by: 14•References: 25

    Previous research shows that how the state conducts itself influences citizen attitudes and behaviors through direct and proximal contact; we show the actions of state agents ripple out even further. Joining bureaucratic data on a publicly observable state behavior—racial disparities in investigatory traffic stops—with survey data, this article shows that residing in a place with extreme racial disparities in traffic stops is associated with depr…

  • Partisan Priorities and Public Budgeting

    Open Access•Derek A Epp, John Lovett et al.•ARTICLE•Political Research Quarterly•2014•Cited by: 13•References: 38

    We explore budget data from twenty-nine Western countries from 1948 to 2012 to investigate the impact of partisan control of government on spending patterns. We use a variety of empirical methods, but the central element of analysis is to code spending allocations as “consistent” or “inconsistent” based on the partisanship of the majority party in government. Looking across the board, we show that inconsistent allocations occur at almost exactly …

  • Punctuated Equilibria in the Private Sector and the Stability of Market Systems

    Open Access•Derek A Epp•ARTICLE•Policy Studies Journal•2015•Cited by: 11•References: 34

    The article examines longitudinal trends in expenditures by over 1,200 private firms, finding evidence of punctuated equilibrium—a pattern of change widely interpreted as evidence of stick‐slip dynamics in decision‐making processes. Levels of punctuation in the private sector closely resemble those observed in studies on public budgeting, suggesting that the private sector is not on average any less resistant to change than government. Both priva…

  • Inequality, Media Frames, and Public Support for Welfare

    Open Access•Derek A Epp, Jay T Jennings et al.•ARTICLE•Public Opinion Quarterly•2021•Cited by: 9•References: 53

    The political preferences of those with high and low incomes are highly correlated, and both groups become less supportive of redistributive spending as economic inequality increases. This article looks for a source of these interincome group correlations by examining trends in media coverage. We find that during periods of higher inequality, media coverage is more likely to focus on the personal characteristics of welfare recipients rather than …

  • Policy Agendas and Economic Inequality in American Politics

    Open Access•Derek A Epp•ARTICLE•Political Studies•2018•Cited by: 7•References: 31

    This article investigates the relationship between economic inequality and US congressional agendas. Longstanding insights into the influence of political spending on public policy suggest that money can narrow the scope of policy conflicts. I argue that rising inequality should intensify these negative-agenda forces as wealthy interests gain a political advantage relative to other social groups and use this advantage to protect their socioeconom…

  • Better for everyone: Black descriptive representation and police traffic stops

    L Christiani, K Shoub et al.•ARTICLE•Politics Groups and Identities•2021•Cited by: 6•References: 23

    Racial disparities in citizen interactions with police are ubiquitous concerns in American communities. What difference does electoral representation make? We demonstrate that black descriptive representation in local government affects police activity and scrutiny in a given community. We use a new dataset comprised of over 79 municipal police departments spanning 6 states, based on tens of millions of individual-level traffic stops. In cities a…

  • The use and effectiveness of investigative police stops

    Derek A Epp, Macey Erhardt•ARTICLE•Politics Groups and Identities•2020•Cited by: 6•References: 5

    This article asks if investigative police stops (1) help officers find contraband, and (2) serve as a bulwark against violent crime. We focus on the experiences of Fayetteville, North Carolina, which in 2012 mandated that police officers obtain written permission from motorists before conducting searches absent any probable cause. The effect of these mandates was a dramatic reduction in the use of so-called “consent searches.” Using traffic stops…

  • Legislative agendas during periods of inequality: Evidence from Europe and the United States

    Derek A Epp, Enrico Borghetto•ARTICLE•Journal of European Public Policy•2021•Cited by: 5•References: 36

    This article investigates the relationship between economic inequality and legislative agendas. It argues that rising inequality makes agenda setting especially vulnerable to the influence of economic elites, and that elites use their influence to keep redistributive policies from receiving governmental attention. Empirical tests use data on public laws and bills introduced in the legislatures of five European countries between 1981 and 2012, and…

  • When Bad News Becomes Routine: Slowly-Developing Problems Moderate Government Responsiveness

    Open Access•Derek A Epp, Herschel F Thomas•ARTICLE•Political Research Quarterly•2023•Cited by: 3•References: 42

    Established theories of the policy process recognize the challenges governments face in processing information. We examine how the ways in which public problems develop over time condition subsequent policy actions. We contend that policymakers will become routinized to and consequently under-respond to the accumulating signals of slowly-developing problems (i.e., those featuring long runs of relatively small changes). Event history analyses leve…

  • Does partisanship explain spending patterns in congressional bill proposals

    Open Access•Laura Quaglia, Laura De Castro Quaglia et al.•ARTICLE•Party Politics•2022•Cited by: 2•References: 40

    We investigate the motivations driving members of the US Congress to introduce bills that require new federal spending, testing a classic “party matters” hypothesis that spending is motivated by partisanship with Democrats spending more on social programs and Republicans more on defense and social order. To test this hypothesis, we introduce a new dataset that codes Congressional Budget Office reports, allowing us to link cost estimates to over 7…

  • Is the populist Robin Hood a fairy tale? Parliamentary attention to social welfare

    Enrico Borghetto, Luca Manucci et al.•ARTICLE•Journal of European Public Policy•2026•Cited by: 1•References: 113

    In the aftermath of the Great Recession, populist parties rose to prominence across Europe, campaigning on the promise to do something about growing economic inequality by funding social welfare programs. We investigate if the pro-welfare reputation of European populist parties, either on the left or the right, is well deserved. We draw on a dataset of questions asked by members of parliament from nine European democracies over three decades. We …

  • The George Floyd Effect: How Protests and Public Scrutiny Changed Police Behavior

    Open Access•Marcel F Roman, Klara Fredriksson et al.•ARTICLE•Perspectives on Politics•2025•Cited by: 1•References: 57

    The murder of George Floyd in May 2020 sparked a wave of Black Lives Matter protests in many cities throughout the United States. Protesters’ demands ranged from constraints on police use of force to defunding and disbanding the police altogether. These have led some to worry about the possibility of a “Ferguson Effect,” where police withdraw from policing, and in particular discretionary stops and searches, with deleterious consequences for crim…

  • Access to Healthcare and Voting: The Case of Hospital Closures in Rural America

    Open Access•Christian Cox, Derek A Epp et al.•ARTICLE•American Political Science Review•2025•Cited by: 1•References: 81

    We investigate how hardships affect rural politics, considering the case of hospital closures. In the last two decades, more than two hundred rural hospitals have closed their doors or drastically reduced their services. Drawing from resource models of voting, our hypothesis is that personal- and community-level deprivations brought about by hospital closures should reduce election turnout. Empirical tests pair geographic information on the locat…

  • Partisan Priorities and Public Budgeting

    Open Access•Derek A Epp, John Lovett et al.•ARTICLE•Political Research Quarterly•2014•Cited by: 13•References: 38

    We explore budget data from twenty-nine Western countries from 1948 to 2012 to investigate the impact of partisan control of government on spending patterns. We use a variety of empirical methods, but the central element of analysis is to code spending allocations as “consistent” or “inconsistent” based on the partisanship of the majority party in government. Looking across the board, we show that inconsistent allocations occur at almost exactly …

  • Punctuated Equilibria in the Private Sector and the Stability of Market Systems

    Open Access•Derek A Epp•ARTICLE•Policy Studies Journal•2015•Cited by: 11•References: 34

    The article examines longitudinal trends in expenditures by over 1,200 private firms, finding evidence of punctuated equilibrium—a pattern of change widely interpreted as evidence of stick‐slip dynamics in decision‐making processes. Levels of punctuation in the private sector closely resemble those observed in studies on public budgeting, suggesting that the private sector is not on average any less resistant to change than government. Both priva…

  • Targeting young men of color for search and arrest during traffic stops: Evidence from North Carolina, 2002–2013

    F R Baumgartner, Derek A Epp et al.•ARTICLE•Politics Groups and Identities•2016•Cited by: 16•References: 2

    North Carolina mandated the first collection of demographic data on all traffic stops during a surge of attention to the phenomenon of “driving while black” in the late 1990s. Based on analysis of over 18 million traffic stops, we show dramatic disparities in the rates at which black drivers, particularly young males, are searched and arrested as compared to similarly situated whites, women, or older drivers. Further, the degree of racial dispari…

  • Complexity, Capacity, and Budget Punctuations

    Open Access•Derek A Epp, F R Baumgartner•ARTICLE•Policy Studies Journal•2017•Cited by: 33•References: 27

    The budgeting literature has long focused on “institutional friction” as a cause of ubiquitous punctuated equilibrium (PE) findings. A recent wave of scholarship looks to identify specific institutional mechanisms that affect the number of punctuations in policy outputs. We contribute to this growing body of research by focusing on the complexity of the institutional environment surrounding a policy area as well as that of the government as a who…

  • Budgetary change in authoritarian and democratic regimes

    F R Baumgartner, Marcello Carammia et al.•ARTICLE•Journal of European Public Policy•2017•Cited by: 45•References: 26

    We compare patterns of change in budgetary commitments by countries during periods of democracy and authoritarianism. Previous scholarship has focused almost exclusively on democratic governments, finding evidence of punctuated equilibria. Authoritarian regimes may behave differently, both because they may operate with fewer institutional barriers to choice and because they have fewer incentives to gather and respond to policy-relevant informatio…

  • The Structure of Policy Change

    Derek A Epp•BOOK•The Structure of Policy Change•2018

    "Government agencies respond to increasingly complex problems and a rapidly changing political environment which creates new priorities, forcing agencies to respond to unanticipated situations, often with little knowledge or preparation, creating instability in the policy making process. Epp argues that agencies vary in the complexity of the problems they face, whether they maintain a level of expertise and capacity to analyze complex problems, a…

  • Suspect Citizens: What 20 Million Traffic Stops Tell Us About Policing and Race

    F R Baumgartner, Derek A Epp et al.•BOOK•Suspect Citizens•2018

    Suspect Citizens offers the most comprehensive look to date at the most common form of police-citizen interactions, the routine traffic stop. Throughout the war on crime, police agencies have used traffic stops to search drivers suspected of carrying contraband. From the beginning, police agencies made it clear that very large numbers of police stops would have to occur before an officer might interdict a significant drug shipment. Unstated in th…

  • The Structure of Policy Change

    Derek A Epp•BOOK•The Structure of Policy Change•2018

  • Policy Agendas and Economic Inequality in American Politics

    Open Access•Derek A Epp•ARTICLE•Political Studies•2018•Cited by: 7•References: 31

    This article investigates the relationship between economic inequality and US congressional agendas. Longstanding insights into the influence of political spending on public policy suggest that money can narrow the scope of policy conflicts. I argue that rising inequality should intensify these negative-agenda forces as wealthy interests gain a political advantage relative to other social groups and use this advantage to protect their socioeconom…

  • Democracy, Authoritarianism, and Policy Punctuations

    Open Access•Bryan D Jones, Derek A Epp et al.•ARTICLE•International Review of Public…•2019•Cited by: 17•References: 43

    Do democracies perform better than more autocratic political systems? Most existing literature focuses on single issues, such as maintaining the peace, avoiding famines, or promoting stable economic growth. The key to policy success for all these and other issues is adaptive policymaking in complex, dynamic environments. Relying on theory and empirical tests from policy process studies, we focus on extreme policy punctuations as indicators of mal…

  • Race, Place, and Context: The Persistence of Race Effects in Traffic Stop Outcomes in the Face of Situational, Demographic, and Political Controls

    Open Access•K Shoub, Derek A Epp et al.•ARTICLE•The Journal of Race Ethnicity and…•2020

    Evidence that racial minorities are targeted for searches during police traffic stops is widespread, but observed differences in outcomes following a traffic stop between white drivers and people of color could potentially be due to factors correlated with driver race. Using a unique dataset recording over 5 million traffic stops from 90 municipal police departments, we control for and evaluate alternative explanations for why a driver may be sea…

  • The use and effectiveness of investigative police stops

    Derek A Epp, Macey Erhardt•ARTICLE•Politics Groups and Identities•2020•Cited by: 6•References: 5

    This article asks if investigative police stops (1) help officers find contraband, and (2) serve as a bulwark against violent crime. We focus on the experiences of Fayetteville, North Carolina, which in 2012 mandated that police officers obtain written permission from motorists before conducting searches absent any probable cause. The effect of these mandates was a dramatic reduction in the use of so-called “consent searches.” Using traffic stops…

  • Race, Place, and Context: The Persistence of Race Effects in Traffic Stop Outcomes in the Face of Situational, Demographic, and Political Controls—corrigendum

    Open Access•K Shoub, Derek A Epp et al.•ARTICLE•The Journal of Race Ethnicity and…•2020

  • Better for everyone: Black descriptive representation and police traffic stops

    L Christiani, K Shoub et al.•ARTICLE•Politics Groups and Identities•2021•Cited by: 6•References: 23

    Racial disparities in citizen interactions with police are ubiquitous concerns in American communities. What difference does electoral representation make? We demonstrate that black descriptive representation in local government affects police activity and scrutiny in a given community. We use a new dataset comprised of over 79 municipal police departments spanning 6 states, based on tens of millions of individual-level traffic stops. In cities a…

  • Legislative agendas during periods of inequality: Evidence from Europe and the United States

    Derek A Epp, Enrico Borghetto•ARTICLE•Journal of European Public Policy•2021•Cited by: 5•References: 36

    This article investigates the relationship between economic inequality and legislative agendas. It argues that rising inequality makes agenda setting especially vulnerable to the influence of economic elites, and that elites use their influence to keep redistributive policies from receiving governmental attention. Empirical tests use data on public laws and bills introduced in the legislatures of five European countries between 1981 and 2012, and…

  • Inequality, Media Frames, and Public Support for Welfare

    Open Access•Derek A Epp, Jay T Jennings et al.•ARTICLE•Public Opinion Quarterly•2021•Cited by: 9•References: 53

    The political preferences of those with high and low incomes are highly correlated, and both groups become less supportive of redistributive spending as economic inequality increases. This article looks for a source of these interincome group correlations by examining trends in media coverage. We find that during periods of higher inequality, media coverage is more likely to focus on the personal characteristics of welfare recipients rather than …

  • Fines, Fees, Forfeitures, and Disparities: A Link Between Municipal Reliance on Fines and Racial Disparities in Policing

    Open Access•K Shoub, L Christiani et al.•ARTICLE•Policy Studies Journal•2021•Cited by: 16•References: 36

    We investigate a possible linkage between municipal reliance on fines, fees, and forfeitures as a revenue source and policing behavior. With a dataset of four million traffic stops made by North Carolina municipalities, we demonstrate that a regular reliance on fines, fees, and forfeitures has powerful, predictable, and racially distinct impacts on black and white drivers, and that fiscal stress exacerbates these differences. A greater regular re…

  • At the intersection: Race, gender, and discretion in police traffic stop outcomes

    Open Access•Kevin Roach, F R Baumgartner et al.•ARTICLE•The Journal of Race Ethnicity and…•2022

    Racial disparities in traffic stop outcomes are widespread and well documented. Less well understood is how racial disparities may be amplified or muted in different contexts. Here we focus on one such situational factor: whether the initial traffic stop was related to a traffic safety violation or a (broadly defined) investigatory purpose. This is a salient contextual characteristic as stop type relates to different levels of assumed discretion …

  • Contact and Context: How Municipal Traffic Stops Shape Citizen Character

    Allison P Anoll, Derek A Epp et al.•ARTICLE•The Journal of Politics•2022•Cited by: 14•References: 25

    Previous research shows that how the state conducts itself influences citizen attitudes and behaviors through direct and proximal contact; we show the actions of state agents ripple out even further. Joining bureaucratic data on a publicly observable state behavior—racial disparities in investigatory traffic stops—with survey data, this article shows that residing in a place with extreme racial disparities in traffic stops is associated with depr…

  • Does partisanship explain spending patterns in congressional bill proposals

    Open Access•Laura Quaglia, Laura De Castro Quaglia et al.•ARTICLE•Party Politics•2022•Cited by: 2•References: 40

    We investigate the motivations driving members of the US Congress to introduce bills that require new federal spending, testing a classic “party matters” hypothesis that spending is motivated by partisanship with Democrats spending more on social programs and Republicans more on defense and social order. To test this hypothesis, we introduce a new dataset that codes Congressional Budget Office reports, allowing us to link cost estimates to over 7…

  • When Bad News Becomes Routine: Slowly-Developing Problems Moderate Government Responsiveness

    Open Access•Derek A Epp, Herschel F Thomas•ARTICLE•Political Research Quarterly•2023•Cited by: 3•References: 42

    Established theories of the policy process recognize the challenges governments face in processing information. We examine how the ways in which public problems develop over time condition subsequent policy actions. We contend that policymakers will become routinized to and consequently under-respond to the accumulating signals of slowly-developing problems (i.e., those featuring long runs of relatively small changes). Event history analyses leve…

  • Measuring disparities to emergency medicine with 200 million voter records: The case of rural hospital closures

    Open Access•Michael E Shepherd, Christian Cox et al.•ARTICLE•The Journal of Rural Health•2025

    PURPOSE: Distance to health service providers is related to increased mortality risk and decreased service utilization. However, existing studies of distance to services often rely either on aggregated measures of distance or small samples of survey respondents. Nationwide individual data from 200 million Americans are used to assess various demographic groups' distances to open acute hospitals. METHODS: We gathered the exact location of every op…

  • Policing Socio-Geographic Boundaries and Inequality

    Open Access•Allison Verrilli, Marcel F Roman et al.•ARTICLE•Perspectives on Politics•2025•References: 14

    How do patterns of racial inequality shape policing behavior in the United States? We investigate whether police engage in boundary maintenance at geographic points of racial difference. Critical race scholars suggest that police explicitly serve this function. Yet empirical studies are rare and limited to snapshots of a single city, making it hard to distinguish practices employed across departments from agency- and officer-level idiosyncrasies.…

  • The political economy of fiscal responsibility

    Open Access•Christian Cox, Derek A Epp et al.•ARTICLE•Public Choice•2025•References: 28

  • The George Floyd Effect: How Protests and Public Scrutiny Changed Police Behavior

    Open Access•Marcel F Roman, Klara Fredriksson et al.•ARTICLE•Perspectives on Politics•2025•Cited by: 1•References: 57

    The murder of George Floyd in May 2020 sparked a wave of Black Lives Matter protests in many cities throughout the United States. Protesters’ demands ranged from constraints on police use of force to defunding and disbanding the police altogether. These have led some to worry about the possibility of a “Ferguson Effect,” where police withdraw from policing, and in particular discretionary stops and searches, with deleterious consequences for crim…

Political science (21 works) · Economics (15 works) · Law (15 works) · Law (12 works) · Politics (11 works) · Policing Practices and Perceptions (10 works) · Sociology (10 works) · Crime Patterns and Interventions (8 works) · Criminology (8 works) · Public economics (8 works)

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