The Effects of China's Minimum Wage Hikes on Firms' Capital-labor Ratio
WANG Wenchun, YIN Hua, GONG Rukai
School of Finance, TaiLong Finance School, Zhejiang Gongshang University; Research Institute for the Development of Shanghai, Shanghai University of Finance and Economics; Glorious Sun School of Business and Management, Donghua University
Summary:
China's labor cost advantage is gradually weakening, and the population is aging rapidly. The minimum wage standard since 2004 has strengthened the rising labor cost trend. Theoretically, increasing capital input and the capital-labor ratio are important measures to help firms cope with rising labor costs and an important way to improve firms' productivity. However, rising labor costs also reduce corporate profits and free cash flow, squeezing investment incentives and curbing capital investment. Therefore, do rising labor costs force firms to increase their capital investment and capital-labor ratio? Do these activities mitigate the negative effects of rising labor costs? Answering these two questions requires a careful examination of both labor and investment inputs. In the face of rising labor costs, whether firms reduce employment and increase investment depends on their ability to transfer the increased wage costs. Thus, the direction of change in the capital-labor ratio depends on the respective directions of change in the labor and investment inputs. Therefore, the impact of rising labor costs on the capital-labor ratio is an open empirical question. Using the annual surveys of industrial firms collected by the National Bureau of Statistics of China and manually collected urban minimum wage data from 2002 to 2011, this paper empirically examines the relationship between labor costs and the capital-labor ratio and the mechanism of this relationship. The results show that an increase in the minimum wage has a significant positive effect on the capital-labor ratio of manufacturing firms. For each 10% increase in the minimum wage, firms' capital-labor ratio increases by 2.0%, and this effect is more significant for firms with wage levels near the minimum wage. Second, inspired by the natural experiment of Card and Krueger (1994), this study exploits the minimum wage increase in Fujian province as a quasi-natural experiment, with firms affected by the increase as the treatment group and firms in geographically adjacent Guangdong province but unaffected by the increase as the control group. The robustness of the conclusions are verified using a difference-in-differences approach. The mechanism analysis shows that the minimum wage increase increases capital input and reduces labor input, providing strong evidence that firms replace labor with capital. Heterogeneity analysis shows that the impact of the minimum wage increase on the capital-labor ratio is concentrated in non-state-owned firms, low-wage firms and labor-intensive firms. Finally, this paper finds that with the minimum wage increase, the productivity and profit of firms also increase significantly. The reduction in production costs is the main factor in the increased profits, verifying the positive effect of replacing labor with capital. This study makes several important contributions. First, it adds to the literature on the effects of minimum wage changes. Studies on the effects of minimum wage changes focus on firms' labor input and output, such as the number of employees, profit, export, productivity and innovation. From the factor substitution perspective, this paper differs from those studies by revealing that faced with rising labor costs, firms change their production and business activities. Second, by investigating firms' capital input, employment and performance, this paper provides strong evidence that enterprises replace labor with capital. This insight deepens understanding of firms' technological upgrades, innovation improvements and industrial structure transformation. This paper also has important policy implications. First, although increasing labor costs decrease firms' employment and exports in the short term, they encourage firms to replace labor with capital, improving labor productivity. Hence, in the long run, increasing labor costs will eliminate Chinese firms' and industries' over reliance on cheap labor and improve firms' innovation ability and the upgrading of the industrial production structure. Second, the findings regarding the mechanism help clarify the trade-off between the minimum wage, capital-labor ratio and employment. The government should take relevant measures, such as reducing corporate taxes and fees, to alleviate firms' burdens, encouraging firms to increase capital input and realize technological upgrading.
[1]蔡昉,2013,《中国经济增长如何转向全要素生产率驱动型》,《中国社会科学》第1期,第56~71页。 [2]陈斌开和林毅夫,2013,《发展战略、城市化与中国城乡收入差距》,《中国社会科学》第4期,第81~102 页。 [3]丁守海,2010,《最低工资管制的就业效应分析——兼论〈劳动合同法〉的交互影响》,《中国社会科学》第1期,第85~102页。 [4]李建强和赵西亮,2021,《固定资产加速折旧政策与企业资本劳动比》,《财贸经济》第4期,第67~82页。 [5]李建强、高翔和赵西亮,2020,《最低工资与企业创新》,《金融研究》第12期,第132~150页。 [6]李磊、王小霞、蒋殿春和方森辉,2019,《中国最低工资上升是否导致了外资撤离》,《世界经济》第8期,第97~120页。 [7]林炜,2013,《企业创新激励:来自中国劳动力成本上升的解释》,《管理世界》第10期,第95~105页。 [8]刘贯春、张军和陈登科,2017,《最低工资、企业生产率与技能溢价》,《统计研究》第1期,第44~54页。 [9]马双、张劼和朱喜,2012,《最低工资对中国就业和工资水平的影响》,《经济研究》第5期,第132~146页。 [10]毛其淋和盛斌,2021,《劳动力成本对中国加工贸易规模及转型升级的影响》,《金融研究》第10期,第59~77页。 [11]聂辉华、方明月和李涛,2009,《增值税转型对企业行为和绩效的影响》,《管理世界》第5期,第17~35页。 [12]孙楚仁、田国强和章韬,2013,《最低工资标准与中国企业的出口行为》,《经济研究》第2期,第42~54页。 [13]唐珏和封进,2019,《社会保险缴费对企业资本劳动比的影响》,《经济研究》第11期,第87~101页。 [14]杨汝岱,2015,《中国制造业企业全要素生产率研究》,《经济研究》第2期,第61~74页。 [15]张杰、郑文平和翟福昕,2016,《融资约束影响企业资本劳动比吗?——中国的经验证据》,《经济学(季刊)》第3期,第1029~1056页。 [16]赵瑞丽、孙楚仁和陈勇兵,2016,《最低工资与企业出口持续时间》,《世界经济》第7期,第97~120页。 [17]郑猛,2016,《有偏技术进步下要素替代增长效应研究》,《数量经济技术经济研究》第11期,第94~110页。 [18]诸竹君、黄先海、宋学印、胡馨月和王煌,2017,《劳动力成本上升、倒逼式创新与中国企业加成率动态》,《世界经济》第8期,第53~77页。 [19]周伟贤,2010,《投资过度还是投资不足——基于A股上市公司的经验证据》,《中国工业经济》第9期,第151~160页。 [20]Acemoglu D., Aghion P., Bursztyn L., and Hemous D., 2012, “The Environment and Directed Technical Change”, American Economic Review,102(1): 131~66. [21]Atanassov J., and Kim E.H., 2009, “Labor and Corporate Governance: International Evidence from Restructuring Decisions”, The Journal of Finance, 64(1): 341~374. [22]Brandt L., Van Biesebroeck J., and Zhang Y., 2012, “Creative Accounting or Creative Destruction? Firm-level Productivity Growth in Chinese Manufacturing”, Journal of Development Economics, 97(2): 339~351. [23]Card D., and Krueger A.B., 1994, “Minimum Wages and Employment: A Case Study of the Fast-food Industry in New Jersey and Pennsylvania”, American Economic Review, 84(4):772~793. [24]Gan L, Hernandez M.A, and Ma S., 2016, “The Higher Costs of Doing Business in China: Minimum Wages and Firms' Export Behavior”, Journal of International Economics, 2016, 100: 81~94. [25]Geng H.G., Huang Y., Lin C., and Liu S., 2021, “Minimum Wage and Corporate Investment: Evidence from Manufacturing Firms in China”, Journal of Financial and Quantitative Analysis, 1~53. [26]Haepp T., and Lin C., 2017, “How does the Minimum Wage Affect Firm Investments in Fixed and Human Capital? Evidence from China”, Review of Development Economics, 21(4):1057~1080. [27]Hasan R., Mitra D., and Sundaram A., 2013, “The Determinants of Capital Intensity in Manufacturing: The Role of Factor Market Imperfections”, World Development, 51: 91~103. [28]Hicks, J.R., 1963, The Theory of Wages, London: Macmillan. [29]Jefferson, G.; Hu, A.G.; Guan, X., and Yu, X., 2003, “Ownership, Performance and Innovation in China's Large-and Medium-Size Industrial Enterprise Sector”, China Economic Review, 14(1):89~113. [30]Levinsohn, J., and A. Petrin, 2003, “Estimating Production Functions Using Inputs to Control for Unobservables”, Review of Economic Studies, 70(2): 317~341. [31]Long C., and Yang, J., 2016, “How do Firms Respond to Minimum Wage Regulation in China? Evidence from Chinese Private Firms”, China Economic Review, 38: 267~284. [32]Mayneris F., Poncet S., and Zhang T., 2018, “Improving or Disappearing: Firm-Level Adjustments to Minimum Wages in China”, Journal of Development Economics, 135: 20~42. [33]Mojon B.,F. Smets, and P. Vermeulen, 2002, “Investment and Monetary Policy in the Euro Area”, Journal of Banking and Finance, 26(11): 2111~2129. [34]Olley, S., and Pakes, A., 1996, “The Dynamics of Productivity in the Telecommunications Equipment Industry”, Econometrica, 64: 263~1298. [35]Schmitt, J., 2013, “Why Does the Minimum Wage Have No Discernible Effect on Employment?” CEPR Working Paper. February 2013. [36]Spaliara M.E., 2009, “Do Financial Factors Affect the Capital-Labour Ratio? Evidence from UK Firm-level Data”, Journal of Banking & Finance, 33(10): 1932~1947.