2 papers
econ.GN2025
Out-of-sample gravity predictions and trade policy counterfactuals
Nicolas Apfel, Holger Breinlich, Nick Green +3
Gravity equations are often used to evaluate the effects of trade policies, such as regional trade agreements. We argue that their suitability for this purpose critically depends o…
econ.EM2019
Verifying the existence of maximum likelihood estimates for generalized linear models
Sergio Correia, Paulo Guimarães, Thomas Zylkin
A fundamental problem with nonlinear models is that maximum likelihood estimates are not guaranteed to exist. Though nonexistence is a well known problem in the binary response mod…