نتایج جستجو برای: social effects

تعداد نتایج: 2096595  

Journal: :Social networks 2009
Pavel N. Krivitsky Mark S. Handcock Adrian E. Raftery Peter D. Hoff

Social network data often involve transitivity, homophily on observed attributes, clustering, and heterogeneity of actor degrees. We propose a latent cluster random effects model to represent all of these features, and we describe a Bayesian estimation method for it. The model is applicable to both binary and non-binary network data. We illustrate the model using two real datasets. We also appl...

2009
Jeff GILL George CASELLA

A generalized linear mixed model, ordered probit, is used to estimate levels of stress in presidential political appointees as a means of understanding their surprisingly short tenures. A Bayesian approach is developed, where the random effects are modeled with a Dirichlet process mixture prior, allowing for useful incorporation of prior information, but retaining some vagueness in the form of ...

2015
Rachel Hart

Homicide rates, like all other crimes, historically suffer from underreporting biases and datasets lacking a wide enough range of countries. However, the UNODC’s Global Study on Homicide have made strides in complete data collections as well as analyzing homicide patterns globally. This paper takes advantage of this dataset and information source to perform a cross-country, fixed-effects regres...

2003
Rajeev H. Dehejia Roberta Gatti Rajeev Dehejia

This paper examines the relationship between child labor and access to credit at a crosscountry level. Even though this link is theoretically central to child labor, so far there has been little work done to assess its importance empirically. We measure child labor as a country aggregate, and credit constraints are proxied by the extent of financial development. These two variables display a si...

2012
David Card Jörg Heining Patrick Kline

We study the role of establishment-specific wage premiums in generating recent increases in West German wage inequality. Models with additive fixed effects for workers and establishments are fit in four distinct time intervals spanning the period 1985-2009. Unlike standard wage models, specifications with both worker and plant-level heterogeneity components can explain the vast majority of the ...

2002
Rajeev H. Dehejia Roberta Gatti Rajeev Dehejia

This paper examines the relationship between child labor and access to credit at a crosscountry level. Even though this link is theoretically central to child labor, so far there has been little work done to assess its importance empirically. We measure child labor as a country aggregate, and credit constraints are proxied by the extent of financial development. These two variables display a st...

2008
Simon Jackman

In many social science settings, the data available for analysis span multiple groups. In these settings it is often plausible that any statistical model we might fit to the data will fit need to flexible, so as to capture variation across the groups, typically accomplished by letting some or all of the parameters vary across the groups. Examples include survey data gathered over a set of locat...

2005
José Antonio Adell Alberto Lekuona

1. INTRODUCTION. In his 1974 book entitled " The Life and Times of the Central Limit Theorem, " Adams [1] describes this theorem as " one of the most remarkable results in all of mathematics " and " a dominating personality in the world of probability and statistics. " More than three decades later, his description is not only still pertinent but has also been corroborated and reinforced by dev...

2005
William M. van der Veld Willem E. Saris

In the past, survey researchers assumed that the respondents held opinions which could be obtained by asking the proper questions. This idea the “file drawing model” for survey response was criticized strongly by Converse in 1964, but also strongly defended by Achen (1975), Erikson (1978, 1979), and Judd et al. (1981). Zaller (1992) introduced the idea that people create their response on the s...

1995
Friedrich Breyer Ben Craig Michael Thies Furio Camillo Rosati Marco Hornung

This article tests the subset of public choice models for social security that have empirical implications. The data, collected from OECD countries for the years 1960, 1970, 1980, and 1990, provide some support for each of the theories. Higher median voter age, more income heterogeneity, greater similarity in family size, and variables that make a public pension program more profitable are all ...

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