Egger, Peter; Nigai, Sergey - C.E.P.R. Discussion Papers - 2015
-time-specific variables or parameters are inevitably biased no matter of whether models are estimated by ordinary least-squares or by … exponential-family models. The reason is that the country-specific variables are endogenous to the residual trade costs … exporter-time, importer-time and country-pair effects works quite well relative to both the saturated model as well as models …