Types of Data- Time Series Time series data has a separate observation for each time period -e.g. stock prices Since not a random sample different problems to consider e Trends and seasonality will be important Economics 20-Prof Anderson 6Economics 20 - Prof. Anderson 6 Types of Data – Time Series Time series data has a separate observation for each time period – e.g. stock prices Since not a random sample, different problems to consider Trends and seasonality will be important