ksr 发表于 2016-8-5 11:17 
判断混合效应,可用LSDV法
reg y x1 x2 x3 i.state, vce(cluster state)
estimates store LSDV
reg Cscore Overconf Own Salesgrowth Invest CFO Revenue ROA i.Stkcd, vce(cluster Stkcd)
matsize too small
You have attempted to create a matrix with too many rows or columns or attempted to
fit a model with too many variables. You need to increase matsize; it is currently
400. Use set matsize; see help matsize.
If you are using factor variables and included an interaction that has lots of missing
cells, either increase matsize or set emptycells drop to reduce the required matrix
size; see help set emptycells.
If you are using factor variables, you might have accidentally treated a continuous
variable as a categorical, resulting in lots of categories. Use the c. operator on
such variables.
stata 报错了这是什么意思啊