why is time series bias omitted time series analysis and omitted variable bias does time series data include omitted variable bias is the omitted variable in a time series a bias? which variable is an example of time series data? when is it fair to say a time series is biased which a time series study is concerned with omitted variable bias? does time series data show bias why is there a tendency for omitted bias in time series analysis? when to use time series data is time series data biased __________ is an omitted variable bias. why is it important to not use time series data quizlet are time series studies affected by omitted variable bias why are time series models omitted is omitted bias a problem with time series time series data and omitted variable bias definition why are time-series studies used? time series bias what is the difference between missing variable and omitted variable