Metrics that is the field of applied econometrics encompasses the statistical methods economists use to untangle cause and effect in human affairs through accessible discussion and with a dose of kung fu themed humor mastering metrics presents the essential tools of econometric research and demonstrates why econometrics is exciting and useful. Our path o ur path begins with experimental random assignment both as a framework for causal questions and a bench mark by which the results from other methods are judged we illustrate the awesome power of random assign ment through two randomized evaluations of the effects of health insurance the appendix to this chapter also uses the. The path from cause to effect applied econometrics known to aficionados as metrics is the original data science metrics encompasses the statistical methods economists use to untangle cause and effect in human affairs through accessible discussion and with a dose of kung fu themed humor mastering metrics presents the essential tools of . When the path to random assignment is blocked we look for alternate routes to causal knowledge wielded skillfully metrics tools other than random assignment can have much of the causality revealing power of a real experiment the most basic of these tools is regression which more than uma may be the effect of a superior harvard