Pooled cross sections o We may want to pool cross sections just to get bigger sample sizes o We may want to pool cross sections to investigate the effect of time e We may want to pool cross sections to investigate whether relationships have changed over time Economics 20- Prof andersonEconomics 20 - Prof. Anderson 3 Pooled Cross Sections We may want to pool cross sections just to get bigger sample sizes We may want to pool cross sections to investigate the effect of time We may want to pool cross sections to investigate whether relationships have changed over time