When estimating process on financial time series, the usual method is to postulate the equations for the process and to estimate the parameter values for each time series. The implicit assumption is that the equations are universal (i.e. identical for all assets), while the parameters are...

We evaluate a simple allocation mechanism of students to majors at college entry that was commonly used in universities in Brazil in the 1990s and 2000s. Students first chose a single major and then took exams that select them in or out of the chosen major. The literature analyzing student...