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Hi, all I run a bivariate probit regression, and I am not specialized in statistics and I dont know how to check collinearity and Heteroscedasticity in the mentioned model. and how do I solve it if it exists ? in fact I use many samples and sometimes it drops a variable for collinearity but when I c...

Hi, Please, how to calculate Kruskal-Wallis tests for the four groups of companies (only domestically orientated companies, exporters, ‘direct investors’ and mixed strategy user) and to know are significantly different? Kruskal-Wallis tests for the log values of the variables: age, number of employe...