Serial Correlation - as a symptom of omitted variable bias

[paulaspinola]

I understand your example considers the data is a time series. What about in cross sections? This would only be the case if the omitted variable is correlated with the covariates in the regression?

[НатальяОрлова-бб]

Hi, seems like, this video and the next one are contradicting in terms of the magnitude of errors (positive/negative)/ Which video is correctly define the type of error for underpredicting and overpredicting?

[lastua]

Could someone here summarize the options of consequences when we have Serial Correlation in the POPULATION?