What is the difference between saving and savings? Money: Although it is no longer backed by anything and it has not been in almost a hundred years, money is still taken to have value. This is because people work to earn it and use it to purchase various things they need and pay for...
Treated cohort: g Pre-treatment period: g − 1 23 ∙ Technically, the ES (leads and lags) only requires that PT holds starting in period g − 1. ∙ Extended TWFE (lags only) effectively averages the pre-treatment periods. ∙ Might be a tradeoff between efficiency and robustness...
This example highlights a difference between the error-form syntax and the covariance-form syntax. The error-form syntax used in this example includes only explicitly included errors. In contrast, the covariance-form syntax includes an error term in each equation, unless the noerror option is ...
However in many situations, variables may be extremely sensitive to take a log-transformation because variables contain both terms of possible zero observations and posi- tive observations which the positive term has a lognormal distribution. The distribution of population that mixes between lognormal ...