After the fall of the Qing dynasty in 1912, China underwent a period of instability and disrupted economic activity. During the Nanjing decade (1927–1937), China advanced in a number of industrial sectors, in particular those related to the military, in an effort to catch up with the west and prepare for war with Japan. The Second Sino-Japanese War (1937–1945) and the following Chinese civil war caused the retreat of the Republic of China and formation of the People's Republic of China. The Republican era was a period of turmoil. From 1913 to 1927, China disintegrated into regional warlords, fighting for authority, causing misery and disrupting growth. After 1927, Chiang Kai-shek managed to reunify China. The Nanjing decade was a period of relative prosperity despite civil war and Japanese aggression. The government began to stabilize tax collection, establish a national budget, sponsor the construction of infrastructure such as communications and railroads, and draw up ambitious national plans, some of which were implemented after 1949. In 1937, the Japanese invaded and laid China to waste in eight years of war. The era also saw boycott of Japanese products. After 1945, the Chinese civil war further devastated China and led to the withdrawal of the Nationalist government to Taiwan in 1949. Yet the economist Gregory Chow summarizes recent scholarship when he concludes that "in spite of political instability, economic activities carried on and economic development took place between 1911 and 1937," and in short, "modernization was taking place." Up until 1937, he continues, China had a market economy which was "performing well", which explains why China was capable of returning to a market economy after economic reform started in 1978. There have been two major competing interpretations (traditionalist vs revisionist) among scholars who have studied China's economy in the late Qing and Republican period. The traditionalists (mainly historians like Lloyd Eastman, Joseph Esherick and others) view China's economic performance from the early 19th to the middle 20th century as abysmal. They view the traditional economic and political system during the late Qing and Republican periods as being unable to respond to the pressures of the West and inhibiting economic growth. These scholars stress the turning point in 1949 when the PRC is founded as acting as allowing for the political and economic revolution required that led to fast economic growth. The revisionists (mainly economists like Thomas Rawski, Loren Brandt and others) view the