of Britain's return to the gold standard in 1925 at pre-war valuation by reference to the wholesale price index. He argued that the index understated the effects of changes in the costs of services and labour. Keynes was deeply critical of the British government's austerity measures during the Great Depression. He believed that budget deficits during recessions were a good thing and a natural product of an economic slump. He wrote, "For Government borrowing of one kind or another is nature's remedy, so to speak, for preventing business losses from being, in so severe a slump as the present one, so great as to bring production altogether to a standstill." At the height of the Great Depression, in 1933, Keynes published The Means to Prosperity, which contained specific policy recommendations for tackling unemployment in a global recession, chiefly counter-cyclical public spending. The Means to Prosperity contains one of the first mentions of the multiplier effect. While it was addressed chiefly to the British Government, it also contained advice for other nations affected by the global recession. A copy was sent to the newly elected President Franklin D. Roosevelt and other world leaders. The work was taken seriously by both the American and British governments, and according to Robert Skidelsky, helped pave the way for the later acceptance of Keynesian ideas, though it had little immediate practical influence. In the 1933 London Economic Conference opinions remained too diverse for a unified course of action to be agreed upon. Keynesian-like policies were adopted by Sweden and Germany, but Sweden was seen as too small to command much attention, and Keynes was deliberately silent about the successful efforts of Germany as he was dismayed by its imperialist ambitions and its treatment of Jews. Apart from Great Britain, Keynes's attention was primarily focused on the United States. In 1931, he received considerable support for his views on counter-cyclical public spending in Chicago, then America's foremost center for economic views alternative to the mainstream. However, orthodox economic opinion remained generally hostile regarding fiscal intervention to mitigate the depression, until just before the outbreak of war. In late 1933 Keynes was persuaded by Felix Frankfurter to address President Roosevelt directly, which he did by letters and face to face in 1934, after which the two men spoke highly of each other. However, according to Skidelsky, the consensus is that Keynes's efforts began to have a more