Reo Takaku, Izumi Yokoyama
What the COVID-19 school closure left in its wake: Evidence from a regression discontinuity analysis in Japan
Journal of public economics
prognostic models used medicine investigating patient outcome relation patient disease characteristics models always work well practice widely recommended need validated idea validating prognostic model generally taken mean establishing works satisfactorily patients whose data derived paper examine meant validation review necessary consider validate model suggest desirable consider two rather different aspects statistical clinical validity examine general approaches validation illustrate issues using several case studies copyright 2000 john wiley sons ltd