 Complete the following phrase:  The American system initially proposed by the first United States Secretary of the Treasury Alexander Hamilton and supported by later US leaders such as Henry Clay, John C Calhoun, and Daniel Webster exhibited the traits of a mixed economy combining protectionism, laissez-faire, and infrastructure spending. By 1914 and the start of World War I Germany had developed a mixed economy with government co-ownership of infrastructure and industry along with a comprehensive social welfare system. After the 