Y7

1. Introduction Explain how it is possible to estimate the partial eect of the exogenous variables, even if ceteris paribus assumption is false Write down the linear model in conditional expectation form and in the error form and explain why the conditional expectation form of the model is more realistic than the assumption that the regressors are deterministic. What assumptions about the error term are related to random sample assumption? Give some examples when the random sample assumption can fail in a cross-section. How can we deal with such cases?