TY - RPRT A1 - Schaffer, M.E. A1 - Stillman, S. T1 - xtoverid: Stata module to calculate tests of overidentifying restrictions after xtreg, xtivreg, xtivreg2 and xthtaylor Y1 - 2010 UR - http://ideas.repec.org/c/boc/bocode/s456779.html ER -