Baltagi, Badi H.; Egger, Peter; Pfaffermayr, Michael - 2014
empirical models specified and estimated are often referred to as gravity models, accruing to their functional-form similarity … to Newton's law of gravity in physics. As Newton's model, gravity models of international trade or factor flows are (at … structure of the data. This chapter is concerned with a host of issues that arise with the estimation of such models, respecting …