Jim Duggan
Dados Biográficos
| ID | 321659 |
|---|---|
| NOME | Jim Duggan |
| PRENOMES | Jim |
| SOBRENOME | Duggan |
| ASSINATURA | DUGGAN J |
| AFILIAÇÕES | University of Rochester |
| ORCID | 0000-0001-8554-2594 |
| VERIFICADO | Sim |
| TOTAL DE OBRAS | 25 |
| TOTAL DE CITAÇÕES | 114 |
| TOTAL COMO AUTOR | 25 |
| TOTAL COMO EDITOR | 0 |
| PRIMEIRO ANO DE PUBLICAÇÃO | 1993 |
| ANO MAIS RECENTE DE PUBLICAÇÃO | 2025 |
| ÍNDICE H | 5 |
Using crisis text messaging service data to measure the impact of the Covid-19 Pandemic on mental health in Ireland
In 2020 and 2021, non-pharmaceutical interventions (NPIs) were implemented globally to mitigate the transmission of COVID-19. This study is aimed to assess the impact of NPIs on the public mental health in Ireland by drawing on two datasets: (1) data of 43,433 chats initiated at Text About It, a free text-based mental health crisis service in Ireland, and (2) emotional well-being indicators reported by respondents of the Amárach public opinion su…
Exploring the effect of fashion obsolescence time on total garment discards
In their paper exploring fast fashion principles and mass production within globalised supply chains (Martinez-Jaramillo & Tilebein, 2024), the authors address a wicked problem, namely, a class of problem that is ill-formulated, with many clients and decision makers with conflicting values (Churchman, 1967; Termeer et al., 2019). An aspect of this complexity can be observed through the multiple influences of modern technology on their model. For …
Representative Voting Games
Are People Optimistically Biased about the Risk of Covid-19 Infection? Lessons from the First Wave of the Pandemic in Europe
Unrealistic optimism, the underestimation of one's risk of experiencing harm, has been investigated extensively to understand better and predict behavioural responses to health threats. Prior to the COVID-19 pandemic, a relative dearth of research existed in this domain regarding epidemics, which is surprising considering that this optimistic bias has been associated with a lack of engagement in protective behaviours critical in fighting twenty-f…
Numbers of close contacts of individuals infected with Sars-CoV-2 and their association with government intervention strategies
We found that the number of contacts per infected case was overdispersed, the mean varied considerable over time and was temporally associated with government interventions. Analysis of the reported number of contacts per individual in contact tracing data may be a useful early indicator of changes in behaviour in response to, or indeed despite, government restrictions. This study provides useful information for triangulating assumptions regardin…
A Model of Interest Group Influence and Campaign Advertising
We analyze a citizen–candidate model of elections between an incumbent and challenger to investigate the logic of interest group influence on election outcomes through campaign advertising. Whereas the incumbent’s position is known to voters, the challenger is relatively unknown, and groups may allocate spending (either directly through independent expenditures or indirectly through campaign donations) to advertise the challenger’s position. We p…
Stock‐flow thinking
Exploring the opportunity of using machine learning to support the system dynamics method
Addressing public health and security challenges with system dynamics
A Formal Theory of Democratic Deliberation
Inspired by impossibility theorems of social choice theory, many democratic theorists have argued that aggregative forms of democracy cannot lend full democratic justification for the collective decisions reached. Hence, democratic theorists have turned their attention to deliberative democracy, according to which "outcomes are democratically legitimate if and only if they could be the object of a free and reasoned agreement among equals" (Cohen …
The Validity of Google Trends Search Volumes for Behavioral Forecasting of National Suicide Rates in Ireland
Annual suicide figures are critical in identifying trends and guiding research, yet challenges arising from significant lags in reporting can delay and complicate real-time interventions. In this paper, we utilized Google Trends search volumes for behavioral forecasting of national suicide rates in Ireland between 2004 and 2015. Official suicide rates are recorded by the Central Statistics Office in Ireland. While similar investigations using Goo…
Weak rationalizability and Arrovian impossibility theorems for responsive social choice
Electoral Accountability and Responsive Democracy
We consider elections with hidden preferences and hidden actions, in which neither voters nor politicians can commit to future choices. When politicians are highly office motivated, they respond by choosing high policies to signal that they are above average, and some below-average politicians must randomise between choosing policies near their ideal points and mimicking above-average politicians by choosing high policies. If voter preferences ar…
Directional equilibria
We propose the solution concept of directional equilibrium for the multidimensional model of voting with general spatial preferences. This concept isolates alternatives that are stable with respect to forces applied by all voters in the directions of their gradients, and it extends a known concept from statistics for Euclidean preferences. We establish connections to the majority core, Pareto optimality, and existence and closed graph, and we pro…
May’s theorem in one dimension
This paper provides three versions of May’s theorem on majority rule, adapted to the one-dimensional model common in formal political modeling applications. The key contribution is that single peakedness of voter preferences allows us to drop May’s restrictive positive responsiveness axiom. The simplest statement of the result holds when voter preferences are single peaked and linear (no indifferences), in which case a voting rule satisfies anony…
Consulting with Citizens in the Design of Wellbeing Measures and Policies
A Folk Theorem for Repeated Elections with Adverse Selection
This article establishes a folk theorem for a model of repeated elections with adverse selection: when citizens (voters and politicians) are sufficiently patient, arbitrary policy paths through arbitrarily large regions of the policy space can be supported by a refinement of perfect Bayesian equilibrium. Politicians are policy motivated (so office benefits cannot be used to incentivize policy choices), the policy space is one-dimensional (limitin…
Revue des revues
utilisation du site ou, le cas chant, des conditions gnrales de la licence souscrite par votre tablissement
Candidate Objectives and Electoral Equilibrium
This article looks at the known foundational results on spatial models of elections. The issues of equilibrium existence, the characterization of equilibria (in terms of their social welfare properties), and the distance between equilibrium policy and positions of the candidates are examined. It then discusses the results of the case where candidates are able to give precise predictions of voters' behaviour precisely; the article also introduces …
The Case for Responsible Parties
Electoral platform convergence is perceived unfavorably by both the popular press and many academic scholars. Arguably, to paraphrase, "it does not provide enough choice" between candidates. This article provides a formal account of the perceived negative effects of platform convergence. We show that when parties do not know voters' preferences precisely, all voters ex ante prefer some platform divergence to convergence at the ex ante median. Aft…
A Dynamic Model of Democratic Elections in Multidimensional Policy Spaces
We propose a general model of repeated elections. In each period, a challenger is chosen from the electorate to run against an incumbent politician in a majority-rule election, and the winner then selects a policy from a multidimensional policy space. Individual policy preferences are private information, whereas policy choices are publicly observable. We prove existence and continuity of equilibria in “simple” voting and policy strategies; we pr…
Gazette
An abstract is not available for this content so a preview has been provided. As you have access to this content, a full PDF is available via the ‘Save PDF’ action button
A Bargaining Model of Collective Choice
We provide a general theory of collective decision making, one that relates social choices to the strategic incentives of individuals, by generalizing the Baron-Ferejohn (1989) model of bargaining to the multidimensional spatial model. We prove existence of stationary equilibria, upper hemicontinuity of equilibrium outcomes in structural and preference parameters, and equivalence of equilibrium outcomes and the core in certain environments, inclu…
Dutta's Minimal Covering Set and Shapley's Saddles
Functional voting operators
A Bargaining Model of Collective Choice
We provide a general theory of collective decision making, one that relates social choices to the strategic incentives of individuals, by generalizing the Baron-Ferejohn (1989) model of bargaining to the multidimensional spatial model. We prove existence of stationary equilibria, upper hemicontinuity of equilibrium outcomes in structural and preference parameters, and equivalence of equilibrium outcomes and the core in certain environments, inclu…
The Case for Responsible Parties
Electoral platform convergence is perceived unfavorably by both the popular press and many academic scholars. Arguably, to paraphrase, "it does not provide enough choice" between candidates. This article provides a formal account of the perceived negative effects of platform convergence. We show that when parties do not know voters' preferences precisely, all voters ex ante prefer some platform divergence to convergence at the ex ante median. Aft…
A Formal Theory of Democratic Deliberation
Inspired by impossibility theorems of social choice theory, many democratic theorists have argued that aggregative forms of democracy cannot lend full democratic justification for the collective decisions reached. Hence, democratic theorists have turned their attention to deliberative democracy, according to which "outcomes are democratically legitimate if and only if they could be the object of a free and reasoned agreement among equals" (Cohen …
Consulting with Citizens in the Design of Wellbeing Measures and Policies
A Dynamic Model of Democratic Elections in Multidimensional Policy Spaces
We propose a general model of repeated elections. In each period, a challenger is chosen from the electorate to run against an incumbent politician in a majority-rule election, and the winner then selects a policy from a multidimensional policy space. Individual policy preferences are private information, whereas policy choices are publicly observable. We prove existence and continuity of equilibria in “simple” voting and policy strategies; we pr…
Electoral Accountability and Responsive Democracy
We consider elections with hidden preferences and hidden actions, in which neither voters nor politicians can commit to future choices. When politicians are highly office motivated, they respond by choosing high policies to signal that they are above average, and some below-average politicians must randomise between choosing policies near their ideal points and mimicking above-average politicians by choosing high policies. If voter preferences ar…
Weak rationalizability and Arrovian impossibility theorems for responsive social choice
A Model of Interest Group Influence and Campaign Advertising
We analyze a citizen–candidate model of elections between an incumbent and challenger to investigate the logic of interest group influence on election outcomes through campaign advertising. Whereas the incumbent’s position is known to voters, the challenger is relatively unknown, and groups may allocate spending (either directly through independent expenditures or indirectly through campaign donations) to advertise the challenger’s position. We p…
May’s theorem in one dimension
This paper provides three versions of May’s theorem on majority rule, adapted to the one-dimensional model common in formal political modeling applications. The key contribution is that single peakedness of voter preferences allows us to drop May’s restrictive positive responsiveness axiom. The simplest statement of the result holds when voter preferences are single peaked and linear (no indifferences), in which case a voting rule satisfies anony…
Functional voting operators
Functional voting operators
Dutta's Minimal Covering Set and Shapley's Saddles
Gazette
An abstract is not available for this content so a preview has been provided. As you have access to this content, a full PDF is available via the ‘Save PDF’ action button
A Bargaining Model of Collective Choice
We provide a general theory of collective decision making, one that relates social choices to the strategic incentives of individuals, by generalizing the Baron-Ferejohn (1989) model of bargaining to the multidimensional spatial model. We prove existence of stationary equilibria, upper hemicontinuity of equilibrium outcomes in structural and preference parameters, and equivalence of equilibrium outcomes and the core in certain environments, inclu…
A Dynamic Model of Democratic Elections in Multidimensional Policy Spaces
We propose a general model of repeated elections. In each period, a challenger is chosen from the electorate to run against an incumbent politician in a majority-rule election, and the winner then selects a policy from a multidimensional policy space. Individual policy preferences are private information, whereas policy choices are publicly observable. We prove existence and continuity of equilibria in “simple” voting and policy strategies; we pr…
Candidate Objectives and Electoral Equilibrium
This article looks at the known foundational results on spatial models of elections. The issues of equilibrium existence, the characterization of equilibria (in terms of their social welfare properties), and the distance between equilibrium policy and positions of the candidates are examined. It then discusses the results of the case where candidates are able to give precise predictions of voters' behaviour precisely; the article also introduces …
The Case for Responsible Parties
Electoral platform convergence is perceived unfavorably by both the popular press and many academic scholars. Arguably, to paraphrase, "it does not provide enough choice" between candidates. This article provides a formal account of the perceived negative effects of platform convergence. We show that when parties do not know voters' preferences precisely, all voters ex ante prefer some platform divergence to convergence at the ex ante median. Aft…
Revue des revues
utilisation du site ou, le cas chant, des conditions gnrales de la licence souscrite par votre tablissement
A Folk Theorem for Repeated Elections with Adverse Selection
This article establishes a folk theorem for a model of repeated elections with adverse selection: when citizens (voters and politicians) are sufficiently patient, arbitrary policy paths through arbitrarily large regions of the policy space can be supported by a refinement of perfect Bayesian equilibrium. Politicians are policy motivated (so office benefits cannot be used to incentivize policy choices), the policy space is one-dimensional (limitin…
Consulting with Citizens in the Design of Wellbeing Measures and Policies
May’s theorem in one dimension
This paper provides three versions of May’s theorem on majority rule, adapted to the one-dimensional model common in formal political modeling applications. The key contribution is that single peakedness of voter preferences allows us to drop May’s restrictive positive responsiveness axiom. The simplest statement of the result holds when voter preferences are single peaked and linear (no indifferences), in which case a voting rule satisfies anony…
Directional equilibria
We propose the solution concept of directional equilibrium for the multidimensional model of voting with general spatial preferences. This concept isolates alternatives that are stable with respect to forces applied by all voters in the directions of their gradients, and it extends a known concept from statistics for Euclidean preferences. We establish connections to the majority core, Pareto optimality, and existence and closed graph, and we pro…
The Validity of Google Trends Search Volumes for Behavioral Forecasting of National Suicide Rates in Ireland
Annual suicide figures are critical in identifying trends and guiding research, yet challenges arising from significant lags in reporting can delay and complicate real-time interventions. In this paper, we utilized Google Trends search volumes for behavioral forecasting of national suicide rates in Ireland between 2004 and 2015. Official suicide rates are recorded by the Central Statistics Office in Ireland. While similar investigations using Goo…
Weak rationalizability and Arrovian impossibility theorems for responsive social choice
Electoral Accountability and Responsive Democracy
We consider elections with hidden preferences and hidden actions, in which neither voters nor politicians can commit to future choices. When politicians are highly office motivated, they respond by choosing high policies to signal that they are above average, and some below-average politicians must randomise between choosing policies near their ideal points and mimicking above-average politicians by choosing high policies. If voter preferences ar…
Stock‐flow thinking
Exploring the opportunity of using machine learning to support the system dynamics method
Addressing public health and security challenges with system dynamics
A Formal Theory of Democratic Deliberation
Inspired by impossibility theorems of social choice theory, many democratic theorists have argued that aggregative forms of democracy cannot lend full democratic justification for the collective decisions reached. Hence, democratic theorists have turned their attention to deliberative democracy, according to which "outcomes are democratically legitimate if and only if they could be the object of a free and reasoned agreement among equals" (Cohen …
Representative Voting Games
Are People Optimistically Biased about the Risk of Covid-19 Infection? Lessons from the First Wave of the Pandemic in Europe
Unrealistic optimism, the underestimation of one's risk of experiencing harm, has been investigated extensively to understand better and predict behavioural responses to health threats. Prior to the COVID-19 pandemic, a relative dearth of research existed in this domain regarding epidemics, which is surprising considering that this optimistic bias has been associated with a lack of engagement in protective behaviours critical in fighting twenty-f…
Numbers of close contacts of individuals infected with Sars-CoV-2 and their association with government intervention strategies
We found that the number of contacts per infected case was overdispersed, the mean varied considerable over time and was temporally associated with government interventions. Analysis of the reported number of contacts per individual in contact tracing data may be a useful early indicator of changes in behaviour in response to, or indeed despite, government restrictions. This study provides useful information for triangulating assumptions regardin…
A Model of Interest Group Influence and Campaign Advertising
We analyze a citizen–candidate model of elections between an incumbent and challenger to investigate the logic of interest group influence on election outcomes through campaign advertising. Whereas the incumbent’s position is known to voters, the challenger is relatively unknown, and groups may allocate spending (either directly through independent expenditures or indirectly through campaign donations) to advertise the challenger’s position. We p…
Exploring the effect of fashion obsolescence time on total garment discards
In their paper exploring fast fashion principles and mass production within globalised supply chains (Martinez-Jaramillo & Tilebein, 2024), the authors address a wicked problem, namely, a class of problem that is ill-formulated, with many clients and decision makers with conflicting values (Churchman, 1967; Termeer et al., 2019). An aspect of this complexity can be observed through the multiple influences of modern technology on their model. For …
Using crisis text messaging service data to measure the impact of the Covid-19 Pandemic on mental health in Ireland
In 2020 and 2021, non-pharmaceutical interventions (NPIs) were implemented globally to mitigate the transmission of COVID-19. This study is aimed to assess the impact of NPIs on the public mental health in Ireland by drawing on two datasets: (1) data of 43,433 chats initiated at Text About It, a free text-based mental health crisis service in Ireland, and (2) emotional well-being indicators reported by respondents of the Amárach public opinion su…
Computer Science (17 obras) · Political science (13 obras) · Economics (12 obras) · Game Theory and Voting Systems (12 obras) · Law (10 obras) · Mathematical economics (10 obras) · Microeconomics (8 obras) · Electoral Systems and Political Participation (7 obras) · Mathematics (7 obras) · Sociology (7 obras)