MPI Econ Workshop
May 3, 2017 - 14:00
Goethe University of Frankfurt - SAFE Research Center
Do Social Ties Lead to Job Referrals: Evidence from US Board Appointments
A growing number of empirical papers are investigating the effects of referrals on labor market outcomes by proxying referrals with social network information. By combining data on professional networks and actual referrals, this paper investigates whether individuals do refer others they share a work history with, therefore providing empirical support for the proxies extensively used in the literature. I use data on board appointments to US publicly listed firms between 2004 and 2008. I first estimate the effect of having social ties with incumbent board members on the probability to be hired on a board and find a positive effect as in the literature. I then relate the existence of social ties to the actual occurrence of referrals. Because unobservable individual characteristics might be driving both labor market outcomes and social networks, I control for the type of firms individuals worked for through placebo networks. When an incumbent and an entrant board members have worked together in the past (real social tie), the incumbent is significantly more likely to refer the entrant. When the incumbent and the entrant board members have worked in the same firm in the past but not at the same time (placebo tie), the incumbent is also more likely to refer the entrant but to a much lower extent or in a non-significative way. This evidence shows that social networks do matter beyond their work history signaling and, importantly, provides empirical support for using social networks as a proxy for referrals.
May 11, 2017 - 14:00
Unstable Political Regimes and Wars as Drivers of International Migration (joint with Alicia Adsera, Carles Boix, and Mariola Pytlikova)
This paper contributes to literature on the determinants of international migration by focusing on whether migration flows respond to political conditions in origin and destination and to political violence, armed conflict and wars. Within standard migration theory, political instability acts as push factors in origins. We expect that people are more likely to emigrate from authoritatian regimes and origins affected by ethnic conflicts and wars in search for a better life. To investigate these hypotheses, we combine: (1) annual data on international migration flows and stocks in 42 destination countries from 223 countries of origin for the period 1980-2010 and UN/world Bank migration data obtained from changes in stocks of foreign population across (decennial) censuses from 160 origin/destinations; (2) data on wars, coup d’etat, revolutions and democratic regimes from different sources; (3) controls of socio- cultural-economic conditions in origins and destinations, and political rights and naturalization regimes for the years 1965-2010. Preliminary findings confirm that political instability in the sending countries triggers the outflow of people and the effect of violence varies with the kind and intensity of war and internal conflicts. These outcomes are robust to the choice of indicators -- particularly for long-lasting and high intense ethnic conflicts.
May 30, 2017 - 14:00