 He comes down firmly in favor of the "demand-side" argument that maldistribution of income in the 1920s having left the bulk of potential consumers with too small a share of national income to buy all that mass production was putting on the market was the principal cause of the collapse.Building on his innovative use of letters written by "ordinary" Americans during the Depression that were collected in his first book, "Down and Out in the Great Depression", McElvaine takes readers into the experience of Depression victims to an extent never before achieved.McElvaine received high praise his work.