Media economics is a field that has grown over the past 40 years as scholars have applied economic theories and principles to study media industries and companies. It involves microeconomic analysis of media firms as well as macroeconomic analysis of media policies and regulations. Key developments in media economics include early studies in the 1950s examining industry structures and competition. The field draws on microeconomic theories like the industrial organization model but could be expanded by incorporating more macroeconomic theories and developing new theories to analyze the dynamic media landscape. Issues going forward include improving methods of measuring competition and developing broader theoretical frameworks.