42 北京工业大学学报(社会科学版) 2017年 Future of Evolutionary Economics LI Jingwen, YUAN Ye School of Economics and Management, Beijing University of Technology, Beijing 100124, China) Abstract: Evolutionary economics is developed on the basis of reflection and criticism of mainstream economics. It breaks through the paradigm of Newtonian mechanics of economics, making economics better inclusive of innovation, dynamics, and complexity. Through comparison and selection, this paper sition system of evolutionary economics from three aspects eoretical framework, methodology and main viewpoints. The theoretical system of evolutionary economics shows excessive fragmentation, which is very unfavorable to the integration of the discipline Evolutionary economics needs to specifically strengthen the work of three aspects: first, strengthen the communication among different branches and disciplines. We need many integral teams which are able to reach a consensus on the basic concepts and problems of evolutionary economics. Second, strengthen the cooperation among different disciplines, especially philosophy. Third, pay more attention to the micro foundation of evolutionary economics. Key words: evolutionary economics; co-evolution theory: enterprise dynamic theory: technological innovation; institutional innovation (责任编辑李世红) (上接第34页) Analysis on Family Happiness of Only Child's Parents and Its Influence factors WANG Lei Institute of Population and Labor Economics, Chinese Academy of Social Sciences, Beijing 100028, China Abstract: Using data from 2015 China Family Happiness Survey, the standardized family happiness score is calculated, a comparative analysis is made between parents of only-child families and the ones of other families. The findings are as follows. Firstly, the fulfillment of fertility desire plays a very important role in family happiness. Secondly, parents of only-child have significantly higher family happiness than other parents. Thirdly, parents who born in 1980s and 1970s have higher family happiness. It is universal two-child policy decreases the ga fertility policy, which will improve people's family happiness, social harmony and population long-term Key words: fertility policy fertility demand; family happiness; parents of only child (责任编辑刘健) 国家哲学社会科学学术期刊数据库 National al Sclences Database42 北 京 工 业 大 学 学 报 （社会科学版) 2017 年 Future of Evolutionary Economics LI Jingwen, YUAN Ye ( School of Economics and Management, Beijing Universityof Technology, Beijing 100124, China) Abstract: Evolutionary economics is developed on the basis of reflection and criticism of mainstream economics. It breaks through the paradigm of Newtonian mechanics of economics, making economics better inclusive of innovation, dynamics, and complexity. Through comparison and selection, this paper makes a systematic exposition of the theoretical system of evolutionary economics from three aspects: theoretical framework, methodology and main viewpoints. The theoretical system of evolutionary economics shows excessive fragmentation, which is very unfavorable to the integration of the discipline. Evolutionary economics needs to specifically strengthen the work of three aspects: first, strengthen the communication among different branches and disciplines. We need many integral teams which are able to reach a consensus on the basic concepts and problems of evolutionary economics. Second, strengthen the cooperation among different disciplines, especially philosophy. Third, pay more attention to the micro foundation of evolutionary economics. Key words: evolutionary economics; co-evolution theory; enterprise dynamic theory; technological innovation; institutional innovation ( 责任编辑李世红 ) (上接第34页) Analysis on Family Happiness of Only Child^s Parents and Its Influence Factors WANG Lei ( Institute ofPopulationand Labor Economics, Chinese AcademyofSocial Sciences, Beijing 100028 ,China) Abstract: Using data from 2015 China Family Happiness Survey, the standardized family happiness score is calculated, a comparative analysis is made between parents of only-child families and the ones of other families. The findings are as follows. Firstly, the fulfillment of fertility desire plays a very important role in family happiness. Secondly, parents of only-child have significantly higher family happiness than other parents. Thirdly, parents who born in 1980s and 1970s have higher family happiness. It is suggested that the universal two-child policy decreases the gap between people 忆 s fertility desire and fertility policy, which will improve people's family happiness, social harmony and population long-term balanced development. Key words: fertility policy; fertility demand; family happiness; parents of only child ( 责任编辑刘健）