, the historian Stephen Schuker demonstrates in American 'Reparations' to Germany, 1919–33, that the capital inflow from American loans substantially exceeded German outpayments so that, on a net basis, Germany received support equal to four times the amount of the post-Second World War Marshall Plan. Schuker also shows that, in the years after Versailles, Keynes became an informal reparations adviser to the German government, wrote one of the major German reparation notes, and actually supported the hyperinflation on political grounds. Nevertheless, The Economic Consequences of the Peace gained Keynes international fame, even though it also caused him to be regarded as anti-establishment – it was not until after the outbreak of the Second World War that Keynes was offered a directorship of a major British Bank, or an acceptable offer to return to government with a formal job. However, Keynes was still able to influence government policy making through his network of contacts, his published works and by serving on government committees; this included attending high-level policy meetings as a consultant.
In the 1920s
Keynes had completed his A Treatise on Probability before the war, but published it in 1921. The work was a notable contribution to the philosophical and mathematical underpinnings of probability theory, championing the important view that probabilities were no more or less than truth values intermediate between simple truth and falsity. Keynes developed the first upper-lower probabilistic interval approach to probability in chapters 15 and 17 of this book, as well as having developed the first decision weight approach with his conventional coefficient of risk and weight, c, in chapter 26. In addition to his academic work, the 1920s saw Keynes active as a journalist selling his work internationally and working in London as a financial consultant. In 1924 Keynes wrote an obituary for his former tutor Alfred Marshall which Joseph Schumpeter called "the most brilliant life of a man of science I have ever read." Marshall's widow was "entranced" by the memorial, while Lytton Strachey rated it as one of Keynes's "best works".
In 1922 Keynes continued to advocate reduction of German reparations with A Revision of the Treaty. He attacked the post World War I deflation policies with A Tract on Monetary Reform in 1923 – a trenchant argument that countries should target stability of domestic prices, avoiding deflation even at the cost of allowing their currency to depreciate. Britain suffered from high unemployment through most of the 1920s, leading Keynes to recommend the depreciation of sterling to boost jobs by making British exports more affordable. From 1924 he was also advocating a fiscal response, where the government could create jobs by spending on public works. During the 1920s Keynes's pro stimulus views had only limited effect on policy makers and mainstream academic opinion – according to Hyman Minsky one reason was that at this time his theoretical justification was "muddled". The Tract had also called for an end to the gold standard. Keynes advised it was no longer a net benefit for countries such as Britain to participate in the gold standard, as it ran counter to the need for domestic policy autonomy. It could force countries to pursue deflationary policies at exactly the time when expansionary measures were called for to address rising unemployment. The Treasury and Bank of England were still in favour of the gold standard and in 1925 they were able to convince the then Chancellor Winston Churchill to re-establish it, which had a depressing effect on British industry. Keynes responded by writing The Economic Consequences of Mr. Churchill and continued to argue against the gold standard until Britain finally abandoned it in 1931.
During the Great Depression
Keynes had begun a theoretical work to examine the relationship between unemployment, money and prices back in the 1920s. The work, Treatise on Money, was published in 1930 in two volumes. A central idea of the work was that if the amount of money be