We investigate the participation and effectiveness of paid endorsers in viral-for-hire social advertising. We conduct a field experiment with an invitation design in which we manipulate both incentives and a soft eligibility requirement to participate in campaigns. The latter provides a strong and valid instrument to separate participation from outcomes effects. Since likes, comments, and retwe...

Abstract: The link between education and health is one of the most robust empirical relationships in the social sciences. However, little research has examined the effects of educational quality on health outcomes. In this paper, we estimate the long run effects on smoking and body mass index of graduating from a selective college in the 1960s using the Wisconsin Longitudinal Study, which has t...

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 sub-intervals spanning the period from 1985 to 2009. We show that these models provide a good approximation to the wage structure and can explain nearly all of the dramatic rise in West German w...

This study investigates how the structure of a supply chain network in the domestic market influences the foreign direct investment (FDI) decisions of firms embedded in the network. We first describe the binary choice of firms on whether to invest through a coordination game of a fixed network with incomplete information of the firms’ profits, and we show that the unique equilibrium of the game...

An area that remains relatively unexamined in the literature on older people is horizontal equity in health care service use. The purpose of this study is to investigate the extent of income-related inequity in the use of GP, inpatient, outpatient and dentist services among individuals aged 65 and older in the UK between 1997 and 2003 using data from the BHPS. The probability of GP, outpatient,...

We consider a well-known controversy that stems from the use of two mixed models for the analysis of balanced experimental data with a fixed and a random factor. It essentially originates in the different statistics developed from such models for testing that the variance parameter associated to the random factor is null. The corresponding hypotheses are interpreted as that of null random facto...