The well-known structural model used to estimate market structure suffers from a severe collinearity problem if the marginal cost and demand equations are linear.

Collinearities among explanatory variables in linear regression models affect estimates from survey data just as t hey do in non-survey data. Unde sirable effects are unnecessarily inflated standard err ors, spuriously low or high t-statistics, and parameter estimates with illogical signs. The available collinearity diagnostics are not generally appropriate for survey data because the variance ...

The Lee-Nauenberg theorem is a fundamental quantum mechanical result which provides the standard theoretical response to the problem of collinear and infrared divergences. Its argument, that the divergences due to massless charged particles can be removed by summing over degenerate states, has been successfully applied to systems with final state degeneracies such as LEP processes. If there are...

Objectives of the study: to demonstrate methodological gaps in empirical work that use structural models area International Business, and prescribe complementary methods mitigate problem collinearity
 Method: a simulation was developed evidence effects collinearity with respect importance significance predictors, actions aimed at controlling undesired developed
 Main results: proposit...