factors have been included to account for potentially correlated heterogeneity in the bilateral dimension that is … unobserved heterogeneity in all three dimensions results in appreciably lower magnitudes of all coefficients (except the one on …

This paper seeks to contribute to the ongoing debate concerning the role of heterogeneity for the GC competitive … advantage. With this aim, we focus on different sources of heterogeneity and study how the different level of heterogeneity … affects the performance of GCs. Specifically, we consider the GC heterogeneity due to: 1) the variety in the firms …

, we explicitly analyse heterogeneity in the value of time and reliability using a novel semi-econometric procedure, based … substantial heterogeneity in the value of time and reliability. In order to avoid misspecification due to restrictive functional … form assumptions, but more importantly, to analyse the importance of observed and unobserved heterogeneity in the value of …