We investigate and compare the growth of export relationships of Chilean forestry companies based on intensive and extensive margins. In turn each margin consists of new export relationships (extensive margin), Survival and Deepening (intensive margin). One risk that an exporter faces during its early years are short-lived relationships, Pursa and Besedes (2010) attribute this behavior to the existence of uncertainty and imperfect information regarding the costs that firms acquire when inserted in destination countries.

We analyzed the reduction in exportation levels of the enterprises which have been working with the Chilean Atlantic Salmon, following the outbreak of ISA virus (ISAv) in 2007. We used a Duration Econometric Model for assessing the risk and survival of the enterprises. Also were determined the factors that explained the reduction of exportation levels, through the Proportional Risk Weibull Model. The results shows that the enterprises affected with ISAv have greater probability of decreasing their exportations.