A review of the basic theory of optimal open-source software contributions points to three key factors affecting the decision to contribute to the open-source development process: non-pecuniary benefits, future expected monetary returns, and open-source licence type. This paper argues that...

In this paper we examine the underlying sources of economic concentration in Israel, which is unusually high for a developed and innovative economy. After a brief review of Israel's economic history since the start of the British Mandate, we describe the level of economic concentration,...

Two key issues in the literature on female labor supply are (i) whether persistence in employment status is due to unobserved heterogeneity or state dependence, and (ii) whether fertility is exogenous to labor supply. Until recently, the consensus was that unobserved heterogeneity is very...

This article develops and estimates an on-the-job search model of the entry of highly skilled immigrants from the former Soviet Union into the Israeli labor market. The estimated parameters of the model, together with information on the wages of immigrants from earlier waves, imply that, on...

Relicensing requirements for professionals who move across borders are widespread. In this article, we measure the effects of occupational licensing by exploiting an immigrant physician retraining assignment rule. Instrumental variables and quantile treatment effects estimates indicate large...