The background of macroeconomic theory - National income accounting: Two, three, four-sector economy - The national income and product acconunts of the United States - Basic concepts - The equilibrium level of income and output: two-sector economy - Changes in the equilibrium level of income and output: the multiplier - Income and consumption - Ther factors influencing consumption - Capital and investment - Investment demand: the profits and accelerator theories - Investment demand: the rate of interest and the role of finance - Goverment demand - Foreign demand - Income, output, employment, and prices - The classical theory - Money and interest - Income, output, money, and interest.