Because of the time required for transport and for customs procedures, the exports of a country or region in a given period will not all be received and counted as imports by partners during the same period. This article presents a method for estimating the transport lag and for simulating the...

The standard import function--imports determined by aggregate economic activity and relative prices--cannot be correctly specified for less developed countries if relative price effects occur largely in the form of changes in exchange restrictions, or if imports consist of producer goods for...