Timothy F Leslie
Dados Biográficos
| ID | 215948 |
|---|---|
| NOME | Timothy F Leslie |
| PRENOMES | Timothy F |
| SOBRENOME | Leslie |
| ASSINATURA | LESLIE T F |
| AFILIAÇÕES | George Mason University |
| ORCID | 0000-0002-4928-3705 |
| VERIFICADO | Sim |
| TOTAL DE OBRAS | 17 |
| TOTAL DE CITAÇÕES | 46 |
| TOTAL COMO AUTOR | 17 |
| TOTAL COMO EDITOR | 0 |
| PRIMEIRO ANO DE PUBLICAÇÃO | 2005 |
| ANO MAIS RECENTE DE PUBLICAÇÃO | 2026 |
| ÍNDICE H | 5 |
All Models Are Wrong, but Can They Be Useful? Lessons from Covid-19 Agent-Based Models
Spatiotemporal Variograms as Neighborhood Definers
Spatial neighborhood definitions are a consistent source of disagreement among geographic scholars. This research will focus on the implementation and evaluation of spatiotemporal variograms (STVs) as a source of spatial neighborhood definition. STVs show the similarity, measured by semivariance, of spatial events to each other when separated by time and space. Over both time and space, there should exist distances over which pairs of points beco…
Enhancing urban resilience
Spatial Associations Between Land Use and Infectious Disease
Land use boundaries represent human-physical interfaces where risk of vector-borne disease transmission is elevated. Land development practices, coupled with rural and urban land fragmentation, increases the likelihood that immunologically naïve humans will encounter infectious vectors at land use interfaces. This research consolidated land use classes from the GLC-SHARE dataset; calculated landscape metrics in linear (edge) density, proportion a…
Examining the spatiotemporal evolution of vaccine refusal
We found an observable spatial structure to vaccine refusal and NME use over time, which appeared to be a self-reinforcing process, as well as a spatially diffusive process. Importantly, we found evidence that use of NMEs in the initially isolated regions appeared to stimulate vaccine refusal in geographically proximal regions. Thus, our results suggest that efforts aimed at decreasing future NME use may be most effective if they target regions w…
Variation in Vaccination Data Available at School Entry Across the United States
Objectives. To compile substate-level data on US school-age children’s vaccination rates. Methods. For states that did not have suitable data online, in 2015 we submitted information requests to the state health department and followed up with the state’s Freedom of Information Act when necessary. Results. The accessibility, scale, and types of vaccination data varied considerably. Whereas 26 states provided data online, 14 released data only aft…
Sociodemographic Predictors of Vaccination Exemptions on the Basis of Personal Belief in California
Objectives. We examined the variability in the percentage of students with personal belief exemptions (PBEs) from mandatory vaccinations in California schools and communities according to income, education, race, and school characteristics. Methods. We used spatial lag models to analyze 2007–2013 PBE data from the California Department of Public Health. The analyses included school- and regional-level models, and separately examined the percentag…
A spatiotemporal analysis of non-medical exemptions from vaccination
Diabetes, obesity, and recommended fruit and vegetable consumption in relation to food environment sub-types
These results suggest that there are sub-types within larger categories of food environments that are differentially associated with adverse health outcomes. These observations support the specific food establishment composition of an area may be an important component of the food establishment-health relationship
Volume per capita as a useful measure of residential space
Residential overcrowding has remained a persistent, low-level phenomenon in the United States over the past 30 years, and has been linked to negative personal health outcomes. A household is typically considered overcrowded if it has more than one person per room (PPR). The PPR measure, however, ignores variations in room size and does not accurately measure residential living space. To remedy this issue, we introduce volume per capita (VPC), a n…
Assessing Immigrant Niches Across Large American Metropolitan Areas
Previous research into immigrant niche formation has largely focused on immigrant niches in individual urban areas, whereas little attention has been paid to the variation in immigrant group niche formation across urban areas. We investigate niche formation across 26 US metropolitan areas. We introduce the Niche Index as a measure of the propensity of an immigrant group to niche, test whether this is consistent across metro areas, and statistical…
Geographic distribution and socio-economic determinants of women's nutritional status in Mali households
Objective Mali is one of the poorest countries in Africa, with 72 % of its population surviving on less than $US 1·00 per day. Health and demographic indicators are bleak. With few exceptions, studies related to the health of women in Mali have largely been under-represented. In addition, in recent years a new type of malnutrition stemming from weight gain and obesity has been observed throughout Africa. The present study aimed to (i) describe ge…
Sociodemographic determinants of growth among Malian adolescent females
In Africa, research concerning the social determinants of poor nutritional status has typically focused on children under 5 years of age and has used defined categorical boundaries based on international reference standards. In this article, stunting and wasting of 1,157 Malian adolescent girls is measured through both categorical and continuous data. The focus on adolescent girls is significant because there is relatively little literature exami…
Postindustrial Manufacturing in a Sunbelt Metropolis
Manufacturing establishments are integral to the spatial structure of fast-growing Sunbelt metropolitan areas, but most concepts and theories of intrametropolitan location were largely developed for an earlier technological era and different spatial contexts. This article investigates the location of nine disaggregated manufacturing sectors in Phoenix, Arizona, showing varying degrees of central core concentration and metropolitan-wide clustering…
Rethinking the regional knowledge production function
The knowledge production function is a questionable device for identifying the determinants of commercial patenting. Adapted from firm level analysis, it implicitly assumes that some mechanism exists to transfer research and development inputs across institutions to maximize invention output. Augmenting the approach with regional structure variables risks confounding causes and effects, because these conditions determine research and development …
Producer Services in the Urban Core and Suburbs of Phoenix, Arizona
Recent research shows growing concentration of corporate decision-making functions in metropolitan cores and strong relationships between managerial activities and producer services. The paper investigates the location of 12 disaggregated producer service sectors in Phoenix, Arizona. Concentration of legal, accounting and computer services underpin the economy of the inner core. Second-order unweighted and employment-weighted distance-based clust…
Spatial Convergence and Spillovers in American Invention
Endogenous growth theory places spatial knowledge spillovers at the center of national technological progress. Advances in spatial autocorrelation and regression analyses provide methods to assess the influence of these spillovers on the geographical distribution and growth of invention. This article investigates interstate inequality and convergence in per capita patenting in the United States in the period 1963–2003. We analyze both the complet…
Sociodemographic Predictors of Vaccination Exemptions on the Basis of Personal Belief in California
Objectives. We examined the variability in the percentage of students with personal belief exemptions (PBEs) from mandatory vaccinations in California schools and communities according to income, education, race, and school characteristics. Methods. We used spatial lag models to analyze 2007–2013 PBE data from the California Department of Public Health. The analyses included school- and regional-level models, and separately examined the percentag…
Spatial Convergence and Spillovers in American Invention
Endogenous growth theory places spatial knowledge spillovers at the center of national technological progress. Advances in spatial autocorrelation and regression analyses provide methods to assess the influence of these spillovers on the geographical distribution and growth of invention. This article investigates interstate inequality and convergence in per capita patenting in the United States in the period 1963–2003. We analyze both the complet…
Rethinking the regional knowledge production function
The knowledge production function is a questionable device for identifying the determinants of commercial patenting. Adapted from firm level analysis, it implicitly assumes that some mechanism exists to transfer research and development inputs across institutions to maximize invention output. Augmenting the approach with regional structure variables risks confounding causes and effects, because these conditions determine research and development …
Producer Services in the Urban Core and Suburbs of Phoenix, Arizona
Recent research shows growing concentration of corporate decision-making functions in metropolitan cores and strong relationships between managerial activities and producer services. The paper investigates the location of 12 disaggregated producer service sectors in Phoenix, Arizona. Concentration of legal, accounting and computer services underpin the economy of the inner core. Second-order unweighted and employment-weighted distance-based clust…
Assessing Immigrant Niches Across Large American Metropolitan Areas
Previous research into immigrant niche formation has largely focused on immigrant niches in individual urban areas, whereas little attention has been paid to the variation in immigrant group niche formation across urban areas. We investigate niche formation across 26 US metropolitan areas. We introduce the Niche Index as a measure of the propensity of an immigrant group to niche, test whether this is consistent across metro areas, and statistical…
Postindustrial Manufacturing in a Sunbelt Metropolis
Manufacturing establishments are integral to the spatial structure of fast-growing Sunbelt metropolitan areas, but most concepts and theories of intrametropolitan location were largely developed for an earlier technological era and different spatial contexts. This article investigates the location of nine disaggregated manufacturing sectors in Phoenix, Arizona, showing varying degrees of central core concentration and metropolitan-wide clustering…
Variation in Vaccination Data Available at School Entry Across the United States
Objectives. To compile substate-level data on US school-age children’s vaccination rates. Methods. For states that did not have suitable data online, in 2015 we submitted information requests to the state health department and followed up with the state’s Freedom of Information Act when necessary. Results. The accessibility, scale, and types of vaccination data varied considerably. Whereas 26 states provided data online, 14 released data only aft…
A spatiotemporal analysis of non-medical exemptions from vaccination
Spatial Convergence and Spillovers in American Invention
Endogenous growth theory places spatial knowledge spillovers at the center of national technological progress. Advances in spatial autocorrelation and regression analyses provide methods to assess the influence of these spillovers on the geographical distribution and growth of invention. This article investigates interstate inequality and convergence in per capita patenting in the United States in the period 1963–2003. We analyze both the complet…
Rethinking the regional knowledge production function
The knowledge production function is a questionable device for identifying the determinants of commercial patenting. Adapted from firm level analysis, it implicitly assumes that some mechanism exists to transfer research and development inputs across institutions to maximize invention output. Augmenting the approach with regional structure variables risks confounding causes and effects, because these conditions determine research and development …
Producer Services in the Urban Core and Suburbs of Phoenix, Arizona
Recent research shows growing concentration of corporate decision-making functions in metropolitan cores and strong relationships between managerial activities and producer services. The paper investigates the location of 12 disaggregated producer service sectors in Phoenix, Arizona. Concentration of legal, accounting and computer services underpin the economy of the inner core. Second-order unweighted and employment-weighted distance-based clust…
Postindustrial Manufacturing in a Sunbelt Metropolis
Manufacturing establishments are integral to the spatial structure of fast-growing Sunbelt metropolitan areas, but most concepts and theories of intrametropolitan location were largely developed for an earlier technological era and different spatial contexts. This article investigates the location of nine disaggregated manufacturing sectors in Phoenix, Arizona, showing varying degrees of central core concentration and metropolitan-wide clustering…
Sociodemographic determinants of growth among Malian adolescent females
In Africa, research concerning the social determinants of poor nutritional status has typically focused on children under 5 years of age and has used defined categorical boundaries based on international reference standards. In this article, stunting and wasting of 1,157 Malian adolescent girls is measured through both categorical and continuous data. The focus on adolescent girls is significant because there is relatively little literature exami…
Geographic distribution and socio-economic determinants of women's nutritional status in Mali households
Objective Mali is one of the poorest countries in Africa, with 72 % of its population surviving on less than $US 1·00 per day. Health and demographic indicators are bleak. With few exceptions, studies related to the health of women in Mali have largely been under-represented. In addition, in recent years a new type of malnutrition stemming from weight gain and obesity has been observed throughout Africa. The present study aimed to (i) describe ge…
Assessing Immigrant Niches Across Large American Metropolitan Areas
Previous research into immigrant niche formation has largely focused on immigrant niches in individual urban areas, whereas little attention has been paid to the variation in immigrant group niche formation across urban areas. We investigate niche formation across 26 US metropolitan areas. We introduce the Niche Index as a measure of the propensity of an immigrant group to niche, test whether this is consistent across metro areas, and statistical…
Diabetes, obesity, and recommended fruit and vegetable consumption in relation to food environment sub-types
These results suggest that there are sub-types within larger categories of food environments that are differentially associated with adverse health outcomes. These observations support the specific food establishment composition of an area may be an important component of the food establishment-health relationship
Volume per capita as a useful measure of residential space
Residential overcrowding has remained a persistent, low-level phenomenon in the United States over the past 30 years, and has been linked to negative personal health outcomes. A household is typically considered overcrowded if it has more than one person per room (PPR). The PPR measure, however, ignores variations in room size and does not accurately measure residential living space. To remedy this issue, we introduce volume per capita (VPC), a n…
Variation in Vaccination Data Available at School Entry Across the United States
Objectives. To compile substate-level data on US school-age children’s vaccination rates. Methods. For states that did not have suitable data online, in 2015 we submitted information requests to the state health department and followed up with the state’s Freedom of Information Act when necessary. Results. The accessibility, scale, and types of vaccination data varied considerably. Whereas 26 states provided data online, 14 released data only aft…
Sociodemographic Predictors of Vaccination Exemptions on the Basis of Personal Belief in California
Objectives. We examined the variability in the percentage of students with personal belief exemptions (PBEs) from mandatory vaccinations in California schools and communities according to income, education, race, and school characteristics. Methods. We used spatial lag models to analyze 2007–2013 PBE data from the California Department of Public Health. The analyses included school- and regional-level models, and separately examined the percentag…
A spatiotemporal analysis of non-medical exemptions from vaccination
Examining the spatiotemporal evolution of vaccine refusal
We found an observable spatial structure to vaccine refusal and NME use over time, which appeared to be a self-reinforcing process, as well as a spatially diffusive process. Importantly, we found evidence that use of NMEs in the initially isolated regions appeared to stimulate vaccine refusal in geographically proximal regions. Thus, our results suggest that efforts aimed at decreasing future NME use may be most effective if they target regions w…
Spatial Associations Between Land Use and Infectious Disease
Land use boundaries represent human-physical interfaces where risk of vector-borne disease transmission is elevated. Land development practices, coupled with rural and urban land fragmentation, increases the likelihood that immunologically naïve humans will encounter infectious vectors at land use interfaces. This research consolidated land use classes from the GLC-SHARE dataset; calculated landscape metrics in linear (edge) density, proportion a…
Spatiotemporal Variograms as Neighborhood Definers
Spatial neighborhood definitions are a consistent source of disagreement among geographic scholars. This research will focus on the implementation and evaluation of spatiotemporal variograms (STVs) as a source of spatial neighborhood definition. STVs show the similarity, measured by semivariance, of spatial events to each other when separated by time and space. Over both time and space, there should exist distances over which pairs of points beco…
Enhancing urban resilience
All Models Are Wrong, but Can They Be Useful? Lessons from Covid-19 Agent-Based Models
Geography (9 obras) · Medicine (8 obras) · Population (8 obras) · Demography (7 obras) · Economics (7 obras) · Environmental health (7 obras) · Economic growth (6 obras) · Computer Science (5 obras) · Economic geography (5 obras) · Sociology (5 obras)