This document discusses various aspects of inflation including its characteristics, causes, types, and effects. It defines inflation as a sustained increase in the general price level in an economy. Inflation can be caused by an excess demand due to an increase in money income or a decrease in production. The types of inflation discussed include comprehensive vs sporadic inflation, wartime vs postwar inflation, and creeping vs walking/running/galloping inflation based on the rate of price increases. The document also examines why governments try to control inflation and outlines some effects of inflation on different sectors of the economy.