Consider the following model: Yi = β1 + β2 X2i + ui. Given the data, an econometrician performs a test in the following manner:1. He estimates the regression and obtains the residuals.2. He runs a regression of the squared residuals on the original explanatory variables, their squared values, and their cross products, and obtains the R2 from this regression.3. He then conducts a statistic, n R2, and compares it to the critical chi-square value at the chosen level of significance.What test is the econometrician conducting, and what is he testing for?

MCQs on Econometrics, which is the use of statistical methods to develop theories or test existing hypotheses in economics or finance.