Econometric is an adjective that describes a branch of economics which uses mathematical and statistical methods to analyze economic data, in order to better understand and predict economic behavior. It involves using empirical evidence from historical data to test hypotheses about how different factors affect the economy, such as changes in interest rates or government policies. Econometricians use sophisticated techniques like regression analysis, time series analysis, and forecasting models to analyze large datasets and draw meaningful conclusions that can inform policy decisions.