This paper presents and evaluates estimation methods for dynamic nonlinear correlated random effects (CRE) models with unbalanced panels. Accounting for the unbalancedness is crucial in dynamic non-linear models and it cannot be ignored even if the process that produces it is completely at...

We use a sample consisting of economists working in 2007 in the world top 81 Economics departments, and Econometric Society Fellows working elsewhere. Productivity is based in each individual’s publications in four journal equivalent classes. We identify three elites consisting of 123, 332,...

Recent results indicate that, in spite of the skewness of citation distributions, the ranking of research units that focus on the upper tail of citation distributions is quite similar to the ranking one obtains with average-based indicators. This paper explores the conjecture that this can be...

This paper studies the evolution of research productivity of a sample of economists working in the best 81 departments in the world in 2007. The main novelty is that, in so far as a productivity distribution can be identified with an income distribution, we measure productivity mobility in a...

Transport infrastructure investment reduces the cost of distance and enables firms to establish and maintain contacts over larger distances. Spain has developed an ambitious road building programme over the last decades, which has considerably reduced transport costs to access European markets....

In contrast to the pattern observed in other developed countries, Spanish wage inequality did not increase during the period from 1995-2006. In this paper we analyse the relative role of supply and demand factors when accounting for this “atypical” fact. Because noticeable changes in both...

This paper studies how unemployment and employment durations for immigrants and natives respond differently to changes in the economic conditions due to the 2008 crisis and to the receipt of unemployment benefits when the economy declines. Using administrative data for Spain, we estimate...

Albarrán et al (2009a) introduced a novel methodology for the evaluation of citation distributions using a pair of high- and low-impact measures defined over the set of articles with citations below or above a critical citation level. Albarrán et al (2009b) presented the first empirical...