EconAir

    INTRODUCTION   For a detailed discussion of the causes of the stock market crash of 1929 and their interaction with the real economy at the beginning of the Great Depression in 1930, see   The Stock Market Crash of 1929 and the Start of the Great Depression     The beginning of the Great Depression, from the stock market crash of October, 1929 to the end of 1930, is crucial to an understanding of the Great Depression, why it was so deep and so difficult to reverse.   The following two data series show just how deep and long the Great Depression was.   The U.S. nominal Gross Domestic Product (GDP) from 1929 through 1941, sourced from the  U.S. Bureau of Economic Analysis via FRED  (in billions of current dollars): 1929:  $104.556 billion 1930:        92.160 billion 1931:        77.391 billion 1932:        59.522 billion 1933:      ...