两位版主或者其他版友：在下急需两篇文章，只能在jstor数据库才能下载，我下不了。

L. Lee and G. Maddala.(1985）：the common structure of tests for selectivity bias, serial correlation and non-normality in the tobit model
T.lin and P.schmidt (1984) a test of the specification of the tobit model against an alternative suggested by craig