The term Wirtschaftswunder (help·info) (German for "economic miracle") describes the rapid reconstruction and development of the economies of West Germany and Austria after World War II (adopting an Ordoliberalism based social market economy). The expression was first used by The Times in 1950.
Beginning with the replacement of the Reichsmark with the Deutsche Mark as legal tender (the Schilling was similarly established in Austria), a lasting period of low inflation and rapid industrial growth was overseen by the government led by German Chancellor Konrad Adenauer and his Minister of Economics, Ludwig Erhard, who went down in history as the "father of the German economic miracle." In Austria, efficient labor practices led to a similar period of economic growth.
The era of economic growth raised Germany and Austria from total wartime devastation to developed nations in modern Europe. At the founding of the European Common Market in 1957 Germany's economic growth stood in contrast to the struggling conditions at the time in the United Kingdom.
West Germany 
The fundamental reason for the quick economic recovery of West Germany can be found in the neoclassical growth model. West Germany had a skilled workforce and a high technological level in 1946, but its capital stock had largely been destroyed during and after the war. This small capital stock as well as production conversion back to civilian goods, monetary and regulatory problems led to an unusually low economic output during the first post-war years.
These initial problems were overcome by the time of the currency reform of 1948 ,which replaced the Reichsmark with the Deutsche Mark as legal tender, halting rampant inflation. This act to strengthen the German economy had been explicitly forbidden during the two years that JCS 1067 was in effect. JCS 1067 had directed the U.S. forces of occupation in Germany to "take no steps looking toward the economic rehabilitation of Germany".
At the same time, the government, following Erhard's advice, cut taxes sharply. Walter Heller, a young economist with the U.S. occupation forces who was later to become chairman of President Kennedy's Council of Economic Advisers, wrote in 1949 that to "remove the repressive effect of extremely high rates, Military Government Law No. 64 cut a wide swath across the German tax system at the time of the currency reform." Individual income tax rates, in particular, fell dramatically. Previously the tax rate on any income over 6,000 Deutschemarks had been 95 percent. After tax reform, this 95 percent rate applied only to annual incomes above 250,000 Deutschemarks. For the German with an annual income of about 2,400 Deutschemarks in 1950, the marginal tax rate fell from 85 percent to 18 percent. 
The Allied dismantling of the West German coal and steel industries decided at the Potsdam Conference was virtually completed by 1950; equipment had then been removed from 706 manufacturing plants in the west and steel production capacity had been reduced by 6,700,000 tons. Although the industrially important Saarland with its rich coal fields was returned to West Germany in 1957, it remained economically integrated in a customs union with France until 1959 and France extracted coal from the area until 1981.
West Germany proceeded quickly after 1948 to rebuild its capital stock and thus to increase its economic output at stunning rates. The very high capital investment rate thanks to low consumption and a very small need for replacement capital investments (due to the still small capital stock) drove this recovery during the 1950s. Living standards also rose steadily, with the purchasing power of wages increasing by 73% from 1950 to 1960. As noted by the British journalist Terence Prittie in the early Sixties:
“Today the German working-man leads a comfortable life and wears a well-filled waistcoat. He eats well, and his food - although German cooking lacks the elegance of French – is wholesome and appetizing. He buys good clothes, and he dresses his wife and children well. He generally has money to spare for television sets, week-end excursions and football matches. And he is not afraid of celebrating occasionally on a grander scale.”
Productivity growth in West Germany enabled most workers to obtain significant improvements in their living standards and ‘security of life.’ In addition, as noted by David Eversley, “As real incomes rose, so public authorities were enabled (and indeed encouraged) to raise funds, both from taxation and through borrowing, to accelerate the rate of investment and current spending in projects which are partly immediately productive, partly conducive to the creation of the good life, as seen in Germany....Any superficial examination of the German townscape, let alone perusal of the statistics, shows that Germany has spent sums on hospitals, libraries, theatres, schools, parks, railway-stations, socially-aided housing, underground railways, airports, museums, and so on which are simply not to be compared with British efforts in this direction.”
In addition to the physical barriers that had to be overcome for the German economic recovery there were also intellectual challenges. The Allies confiscated intellectual property of great value, all German patents, both in Germany and abroad, and used them to strengthen their own industrial competitiveness by licensing them to Allied companies. Beginning immediately after the German surrender and continuing for the next two years the U.S. pursued a vigorous program to harvest all technological and scientific know-how as well as all patents in Germany. John Gimbel comes to the conclusion, in his book "Science Technology and Reparations: Exploitation and Plunder in Postwar Germany", that the "intellectual reparations" taken by the U.S. and the UK amounted to close to $10 billion. During the more than two years that this policy was in place, no industrial research in Germany could take place, as any results would have been automatically available to overseas competitors who were encouraged by the occupation authorities to access all records and facilities.
Marshall Plan 
The Marshall Plan gave a moral boost, but very little actual financial assistance until the recovery was already in full swing.
The Marshall Plan was only extended to Western Germany after it was realized that the suppression of its economy was holding back the recovery of other European countries and was not the main force behind the Wirtschaftswunder. Had that been the case, other countries such as the United Kingdom, which received much greater economic assistance than Germany, should have experienced the same phenomenon. However, often overlooked is the effect of the "unofficial contributions" of 150,000 U.S. occupation troops, earning as much as 4 Deutsche Marks to the dollar. These marks were spent within Germany to buy food, luxury items, beer and cars, as well as entertaining the locals and for prostitutes. During exercises such numbers of soldiers would swell to over a quarter-million. Nonetheless, the amount of monetary aid, which was mainly in the form of loans, about $1.4 billion, was greatly overshadowed by the amount the Germans had to pay back as war reparations and by the charges the Allies made on the Germans for the ongoing cost of the occupation, about $2.4 billion per year. In 1953 it was decided that Germany would repay $1.1 billion of the aid it had received. The last repayment was made in June 1971.
The demands of the Korean war in 1950-53 led to a global shortage of goods that helped overcome lingering resistance to the purchase of German products. At the time Germany had a large pool of skilled labour, partly as a result of the deportations and migrations which affected up to 16.5 million Germans. This helped Germany to more than double the value of its exports during and shortly after the war. Apart from these factors, hard work and long hours at full capacity among the population in the 1950s, 1960s and early 1970s and extra labour supplied by thousands of Gastarbeiter ("guest workers", since the late 1950s) provided a vital base for the sustainment of the economic upturn with additional workforce.
From the late 1950s onwards, West Germany had one of the world's strongest economies. The East German economy also showed strong growth, but not as much as in West Germany, due to the bureaucratic system, emigration of working-age Germans to West Germany and continued reparations to the USSR in terms of resources. Unemployment hit a record low of 0.7-0.8% in 1961-1966 and 1970-1971.
Ludwig Erhard, who served as Minister of the Economy in Chancellor Adenauer's cabinet from 1949 until 1963 and would later rise to Chancellor himself, is often associated with the German Wirtschaftswunder.
Austria was also included in the Marshall Plan and can thus be included in any consideration of the Wirtschaftswunder. Through the nationalisation of some industries (VOEST, AMAG) and yet more long working hours, full economic capacity was reached. Using West Germany as a guide, the currency was stabilised when the Schilling was reintroduced in place of the Reichsmark. This economic policy was known in journalistic circles as the Raab-Kamitz-Kurs, named after Chancellor Julius Raab and his Finance Minister Reinhard Kamitz similar to the German Adenauer-Erhard-Kurs.
See also 
- Economy of Germany
- History of the Ruhr District
- Industrial plans for Germany
- Morgenthau Plan
- Marshall Plan
- Post-World War II boom
- Social market economy
- Gareau, Frederick H. (1961). "Morgenthau's Plan for Industrial Disarmament in Germany". Western Political Quarterly (University of Utah) 14 (2): 517–534. doi:10.2307/443604. JSTOR 443604.
- "Columbia Electronic Encyclopedia - Saarland"
- Life World Library: Germany by Terence Prittie and the editors of LIFE, 1963, P.71-72
- Poverty and Inequality in Common Market Countries edited by Victor George and Roger Lawson
- C. Lester Walker "Secrets By The Thousands", Harper's Magazine. October 1946
- Norman M. Naimark The Russians in Germany pg. 206. (Naimark refers to Gimbels book)
- The $10 billion compares to the U.S. annual GDP of $258 billion in 1948.
- The $10 billion compares to the total Marshall plan expenditure (1948-1952) of $13 billion, of which Germany received $1.4 billion (partly as loans).
- "Pas de Pagaille!", July 28, 1947
- German Economic "Miracle" by David R. Henderson
- "Marshall Plan 1947-1997 A German View" by Susan Stern at the Wayback Machine (archived July 9, 2006)
- “Deployment of Military Personnel by Country,” U.S. Department of Defense, Washington Headquarters Services
- German Economic "Miracle" - The library of economics and liberty
- PDF (147 KiB)
- Interview with Gunther Harkort Representative of the Federal Republic of Germany to the Economic Cooperation Administration (ECA), 1949-1952.
- Interview with General Lucius D. Clay Deputy to U.S. General Dwight D. Eisenhower, 1945; deputy military governor, Germany (U.S.) 1946; commander in chief, U.S. Forces in Europe and military governor, U.S. Zone, Germany, 1947–49; retired 1949.
- Interview with General William Henry Draper Jr. Chief, Economics Division, Control Council for Germany, 1945–1946; Military Government Adviser to the Secretary of State, Moscow Conference of Foreign Ministers, 1947; Under Secretary of War, 1947; Under Secretary of the Army, 1947–1949;
- 'Time Magazine Faceless Crisis', April 4, 1949
- Letter from Konrad Adenauer to Robert Schuman (26 July 1949) Warning him of the consequences of the dismantling policy.
- Picture of demonstration against dismantling (7 June 1949) Workers in the Ruhr demonstrate against the dismantling of their factories by the Allied forces of occupation.
- Picture: dismantling the Iron and Steel Industry ‘We want to work, we will help you to rebuild Europe' Workers at dismantled plant protest.
- Picture: 12,000 factory workers demonstrate against the dismantling of German industry (19 August 1949)
- German Economic Miracle