seemed to suggest that market-based incentives or increasing voluntariness is not morally better but that it is, in the end, more effective. In 1988, Zeng Yi and Professor T. Paul Schultz of Yale University discussed the effect of the transformation to the market on Chinese fertility, arguing that the introduction of the contract responsibility system in agriculture during the early 1980s weakened family planning controls during that period. Zeng contended that the "big cooking pot" system of the People's Communes had insulated people from the costs of having many children. By the late 1980s, economic costs and incentives created by the contract system were already reducing the number of children farmers wanted. A long-term experiment in a county in Shanxi, in which the family planning law was suspended, suggested that families would not have many more children even if the law were abolished. A 2003 review of the policy-making process behind the adoption of the one-child policy shows that less intrusive options, including those that emphasized delay and spacing of births, were known but not fully considered by China's political leaders. Unequal enforcement Corrupted government officials and especially wealthy individuals have often been able to violate the policy in spite of fines. Filmmaker Zhang Yimou had three children and was subsequently fined 7.48million yuan ($1.2million). For example, between 2000 and 2005, as many as 1,968 officials in Hunan province were found to be violating the policy, according to the provincial family planning commission; also exposed by the commission were 21 national and local lawmakers, 24 political advisors, 112 entrepreneurs and 6 senior intellectuals. Some of the offending officials did not face penalties, although the government did respond by raising fines and calling on local officials to "expose the celebrities and high-income people who violate the family planning policy and have more than one child". Also, people who lived in the rural areas of China were allowed to have two children without punishment, although the family is required to wait a couple of years before having another child. Human rights violations The one-child policy has been challenged for violating a human right to determine the size of one's own proper family. According to a 1968 proclamation of the International Conference on Human Rights, "Parents have a basic human right to determine freely and responsibly the number and the spacing of their children." According to the UK newspaper The Daily Telegraph, a