Missing Data in the Structural Gravity: Estimation Bias due to the Omission of Internal Trade

Bahía Blanca

Congreso; LIV Reunión Anual de la AAEP; 2019

Asociación Argentina de Economía Política

In the last decade there has been an intense development in trade models  aiming  to  explain  the  determinants  of  bilateral  trade.  A  seminal theoretical and methodological contribution is Anderson and van Wincoop (2003), who introduced the concept of multilateral resistance and structural gravity. However, there is  still  an important  gap  between the  theoretical developments of the structural gravity model and its empirical applications. The main two issues are: the presence of zeros in bilateral trade and the missing data problem of own production oriented to the own market. The presence of zero trade has been considered in Santos Silva and Tenreyro (2006) and Helpman, Melitz and Rubinstein (2008), but the effects of the lack of internal transactions in the estimation of the gravity model has not been much studied, even when its relevance can be thought to be of greater importance, because the great heterogeneity across countries in terms of their degrees of openness. The objective of the paper is, through the use of state of the art tools, analyze and characterize the consequence of the omission of internal transactions in the estimation of trade proximities (trade costs) and on  the  values  of  multilateral  resistances,  which  in  turn  will  affect  the comparative static effects derived from different trade policy measures.