Rising wage differential between white-collar and blue-collar workers and market concentration: The case of the USA, 1964-2007
Keywords:market concentration, wage differential, white-collar and blue-collar workers
I suggest that market concentration at aggregate level has a significant structural impact on the wage differential between white-collar and blue-collar workers. Both phenomena are increasing as larger firms are more inclined to employ and pay more white-collar workers, in order to increase and/or maintain their market share by way of innovative tasks carried out by white-collars such as R&D, design and product differentiation, financial/capital market operations, market research, advertising and sales operations, etc. The causality from market concentration to wage differential runs through an effective demand channel and one based on the diffusion of innovations. The innovative contribution of the paper is to reveal this relationship of structural causality, and to provide a new measurement of aggregate market concentration which is calculated as the reverse of the break-even point. The argument is tested for the case of the USA between 1964 and 2007 using Vector Error Correction Model. The findings confirm the existence of a long-run positive relationship from market concentration in the nonfinancial corporate sector to the wage differential.
JEL codes: L1, D4, J31
Acemoglu D. (1998), “Why Do New Technologies Complement Skills? Directed Technical Change and Wage Inequality”, The Quarterly Journal of Economics, 113 (4), pp. 1055-1089.
Acemoglu D. (1999), “Changes in Unemployment and Wage Inequality: An Alternative Theory and Some Evidence”, The American Economic Review, 89 (5), pp. 1259-1278.
Acemoglu D. (2003), “Patterns of Skill Premia”, The Review of Economic Studies, 70 (2), pp. 199-230.
Acemoglu D. and Autor D.H. (2010), “Skills, Tasks and Technologies: Implications for Employment and Earnings”, NBER Working Paper, n. 16082, Cambridge (MA): National Bureau of Economic Research.
Afonso A. and Jalles J.T. (2015), “Markups’ Cyclical Behavior: The Role of Demand and Supply Shocks”, ISEG Economics Department Working Paper, n. WP08/2015/DE/UECE.
Aghion P., Acemoglu D. and Violante G.L. (2001), “Deunionization, Technical Change and Inequality”, Carnegie-Rochester Conference Series on Public Policy, n. 55, pp. 229-264, available at: http://economics.mit.edu/files/5691 (Date of Access: 03.12.2016).
Aghion P. and Howitt P. (2002), “Wage Inequality and the New Economy”, Oxford Review of Economic Policy, 18 (3), pp. 306-323.
Aghion P., Bloom N., Blundell R., Griffith R. and Howitt P. (2005), “Competition and Innovation: An Inverted-U Relationship”, The Quarterly Journal of Economics, 120 (2), pp. 701-728.
Allen B. (1968), “Market Concentration and Wage Increases: U.S. Manufacturing, 1947-1964”, Industrial and Labor Relations Review, 21 (3), pp. 353-366.
Almeida-Santos F., Chzhen Y. and Mumford K. (2010), “Employee Training and Wage Dispersion: White and Blue Collar Workers in Britain”, IZA Discussion Paper, n. 4821.
Alp E. and Seven Ü. (2019), “The dynamics of household final consumption: The role of wealth channel”, Central Bank Review, 19 (1), pp. 21-32.
Antenucci F. (2018), “China Syndrome or Not? Labour Market Effects of a Greater Trade Openness in U.S. Manufacturing”, Departmental Working Papers of Economics, University Roma Tre 0242, Department of Economics.
Antonczyk D., Fitzenberger B. and Sommerfeld K. (2010), “Rising Wage Inequality, the Decline of Collective Bargaining, and the Gender Wage Gap”, IZA Discussion Paper, n. 4911, available at: http://ftp.iza.org/dp4911.pdf (Date of Access: 08.09.2016).
Autor D.H., Katz L.F. and Kearney M.S. (2005), “Rising Wage Inequality: The Role of Composition and Prices”, available at: http://economics.mit.edu/files/11659 (Date of access: 05.09.2016).
Autor D.H., Katz L.F. and Kearney M.S. (2008), “Trends in U.S. Wage Inequality: Revising the Revisionists”, Review of Economics and Statistics, 90 (2), pp. 300-323.
Autor D.H. (2014), “Skills, Education, and the Rise of Earnings Inequality Among the ‘Other 99 Percent’”, Science, 344 (6186), pp. 843-85.
Autor D.H., Dorn D., Katz F.L., Patterson C. and Van Reenan J. (2017), “The Fall of the Labor Share and the Rise of Superstar Firms”, NBER Working Paper.
Azar J., Marinescu I.E. and Marshall S. (2017), “Labor Market Concentration”, NBER Working Paper, n. 24147, Cambridge (MA), available at: https://doi.org/10.3386/w24147.
Azar J., Marinescu I.E., Marshall S. and Taska B. (2018), “Concentration in U.S. Labor Markets: Evidence from Online Vacancy Data”, NBER Working Paper, March 2018, available at: http://dx.doi.org/10.2139/ssrn.3133344.
Bain J. (1951), “Relation of Profit Rate to Industry Concentration: American Manufacturing, 1936-1940”. The Quarterly Journal of Economics, 65 (3), pp. 293-324, retrieved from: http://www.jstor.org/stable/1882217.
Baran P. and Sweezy P. (1966), Monopoly Capital, New York, NY: Monthly Review Press.
Belleflamme P. and Peitz M. (2010), Industrial Organization Markets and Strategies, Cambridge: Cambridge University Press.
Benmelech E., Bergman N., and Kim H. (2018), “Strong Employers and Weak Employees: How Does Employer Concentration Affect Wages?”, NBER Working paper, January 2018.
Bisello M. and Fernández-Macías E. (2018), “Are Blue-Collar Jobs Turning White?”, available at: https://www.socialeurope.eu/are-blue-collar-jobs-turning-white.
Bivens J., Mishel L. and Schmitt J. (2018), “It’s Not Just Monopoly and Monopsony: How Market Power Has Affected American Wages”, Economic Policy Institute Report, April 2018.
Black S. and Spitz-Oener A. (2010), “Explaining Women’s Success: Technological Change and the Skill Content of Women’s Work”, Review of Economics and Statistics, 92 (1), pp. 187-194.
Blanchflower D.G. and Oswald A.J. (1990), “The Determination of White Collar Pay”, Oxford Economic Papers, New Series 42 (2), pp. 356-378.
Blonigen B.A. and Pierce J.R. (2016), “Evidence for the Effects of Mergers on Market Power and Efficiency”, Finance and Economics Discussion Series; n. 2016-082, Washington: Board of Governors of the Federal Reserve System, available at: https://doi.org/10.17016/FEDS.2016.082 (Date of Access: 23.12.2016).
Brennan J. (2016), “Rising Corporate Concentration, Declining Trade Union Power, and the Growing Income Gap: American Prosperity in Historical Perspective”, Levy Institute of Economics, E-Pamphlet, available at: http://www.levyinstitute.org/pubs/e_pamphlet_1.
pdf (Date of Access: 04.03.2016).
Brancaccio E., Giametti R., Lopreite M. and Puliga M. (2018), “Centralization of capital and financial crisis: A global network analysis of corporate control”, Structural Change and Economic Dynamics, vol. 45, pp. 94-104.
Brooks C. (2008), Introductory Econometrics for Finance. Cambridge: Cambridge University Press.
Brüggemann R. (2006), “Sources of German unemployment: a structural vector error correction analysis”, Empirical Economics, 31 (2), pp 409-431.
Burstein A., Morales E. and Vogel J. (2016), “Changes in Between-Group Inequality: Computers, Occupations, and International Trade”, available at: http://www.columbia.edu/~jev9/BMV.pdf (Date of Access: 17.12.2016).
Card D. (2001), “The Effect of Unions on Wage Inequality in the U.S. Labor Market”, Industrial and Labor Relations Review, 54 (2), pp. 298-315.
Card D. and DiNardo J.E. (2002), “Skill-Biased Technological Change and Rising Wage Inequality: Some Problems and Puzzles”, Journal of Labor Economics, 20 (4), pp. 733-783.
Card D., Lemieux T. and Riddell W.C. (2004), “Unions and Wage Inequality”, Journal of Labor Research, 25 (4), pp. 519-559.
Card D., Cardoso A.R., Heining J. and Kline P. (2018), “Firms and Labor Market Inequality: Evidence and Some Theory”, Journal of Labor Economics, 36 (S1), pp. S13-S70.
Chang H., Hall C.M. and Paz M.T. (2017), “Customer Concentration and Cost Structure”, Cornell University School of Hotel Administration, Working Paper n. 9.
Conyon M.J. (1992), “Income Distribution, Efficient Bargaining and Market Structure”, Economic Letters, 40 (2), pp. 181-185.
Conyon M.J. (1994), “Labour's Share, Market Structure and Trade Unionism”, International Journal of Industrial Organization, 12 (1), pp. 117-131.
Council of Economic Advisers, White House. (2016), “Benefits of Competition and Indicators of Market Power”, Issue Brief, available at: https://obamawhitehouse.archives.gov/sites/default/files/page/files/20160414_cea _competition_issue_brief.pdf (Date of Access: 17.05.2016).
Cowling K. (1982), Monopoly Capitalism. London: Macmillan.
Crespi G.A. and Patel P. (2008), “Relationship Between Innovation and Competition: Differences across Sectors”, The Network Driving European Innovation, Europe Innova, pp. 1-3.
Davis L.E. (2018), “Financialization and the non‐financial corporation: An investigation of firm‐level investment behavior in the United States”, Metroeconomica, (69) 1, pp. 270-307.
Deleidi M. 2018. “Post Keynesian Endogenous Money Theory: A Theoretical and Empirical Investigation of the Credit Demand Schedule”, Journal of Post Keynesian Economics, 41 (2), pp. 185-209. DOI: 10.1080/01603477.2017.1338967.
De Loecker J., Eeckhout J. and Unger G. (2017), “The Rise of Market Power and the Macroeconomic Implications”, NBER Working Paper, n. 23687, Cambridge (MA): National Bureau of Economic Research.
Dées S. and Güntner. J. (2016), “Forecasting Price Dynamics Across Euro Area Countries and Sectors – A Panel VAR Approach”, Journal of Forecasting, 36 (4), pp. 431-453.
DiNardo J., Fortin N.M. and Lemieux T. (1996), “Labor Market Institutions and the Distribution of Wages, 1973-1992: A Semiparametric Approach”, Econometrica, 64 (5), pp. 1001-1044.
Dögüs I. (2018), “Wage Dispersion and Pension Funds: Financialisation of Non-financial Corporations in the USA”, PSL Quarterly Review, 71 (284), pp. 41-59.
Dögüs I. (2019), “Consumption Dispersion Between White-Collar and Blue-Collar Workers and Rising Market Concentration in the USA: 1984-2011”, ZÖSS Working Paper 72.
Engle R. and Granger C. (1987), “Cointegration and Error Correction Representation: Estimation and Testing”, Econometrica, 55 (2), pp. 251-276.
Even W.E. and Macpherson D.A. (2012), “Is Bigger Still Better? The Decline of the Wage Premium at Large Firms”, Southern Economic Journal, 78(4), pp. 1181-1201.
Eggertsson G.B., Robbins J.A. and Wold E.G. (2018), “Kaldor and Piketty’s Facts: The Rise of Monopoly Power in the United States”, NBER Working Paper, n. 24287, Cambridge (MA): National Bureau of Economic Research.
Fernandes P.A., Ferreira, P. and Winters L.A. (2014a), “The Effect of Competition on Managers’ Compensation: Evidence from a Quasi-Natural Experiment”, NIMA Working Paper, n. 57, available at: http://www3.eeg.uminho.pt/publications/NIMAwp57.pdf (Date of access: 06.01.2017).
Fernandes P.A., Ferreira P. and Winters L.A. (2014b), “Firm Entry Deregulation, Competition and Returns to Education and Skill”, European Economic Review, 70, pp. 210–230.
Firpo S., Fortin N.M. and Lemieux T. (2011), “Occupational Tasks and Changes in the Wage Structure”, IZA Discussion Paper, No. 5542, available at SSRN: https://ssrn.com/abstract=1778886.
Foster J.B., McChesney R.W. and Jonna R.J. (2011), “Monopoly and Competition in Twenty-First Century Capitalism”, Monthly Review, 62 (11), monthlyreview.org/2011/04/01/monopoly-and-competition-in-twenty-first-century-capitalism/ (Date of Access: 08.09.2016).
Freeman B.R. (1982), “Union Wage Practices and Wage Dispersion within Establishments”, Industrial and Labor Relations Review, (36), pp. 3–21.
Freeman B.R. (1993), “How Much Has De-Unionization Contributed to the Rise in Male Earnings Inequality?”, in Uneven Tides: Rising Inequality in America, edited by S. Danziger and P. Gottschalk. New York: Russell Sage Foundation.
Freeman B.R. (2005), “What Do Unions Do?”, Journal of Labor Research, 26, pp. 641–668.
Fuglie K., Heisey P., King J. and Schimmelpfennig D. (2012), “Rising Concentration in Agricultural Input Industries Influences New Farm Technologies”. Amber Waves. 10.
Galbraith J.K. (1967), The New Industrial State. Boston: Houghton Mifflin Company.
Galí J. (1994), “Monopolistic Competition, Endogenous Markups, and Growth”, European Economic Review, 38 (3-4), pp. 748-775.
Gali J., Gertler M. and Lopez-Salido J.D. (2007), “Markups, Gaps, and the Welfare Costs of Business Fluctuations”, Review of Economics and Statistics, 89 (1), pp. 44–59.
Gereffi G., Humphrey J. and Sturgeon T. (2005), “The Governance of Global Value Chains”, Review of International Political Economy, 12 (1), pp. 78-104.
Gordon M.J. (1998), “Monopoly Power in the United States Manufacturing Sector, 1899 to 1994”, Journal of Post Keynesian Economics, 20 (3), pp. 323-335.
Granger C.W.J. (1969), “Investigating Causal Relationship by Econometric Models and Gross Special Methods”, Econometrica, 37 (3), pp. 425-435.
Greenfield R. (2016), “Say goodbye to your annual pay rise”, The Independent, June 22.
Greenwood-Nimmo M. and Tarassow A. (2013), “A Macroeconometric Assessment of Minsky's Financial Instability Hypothesis”, DEP (Socioeconomics) Discussion Papers, Macroeconomics and Finance Series, n. 6/2013, available at: https://www.wiso.uni-hamburg.de/repec/hepdoc/macppr_6_2013.pdf (Date of Access: 27.12.2016).
Grullon G., Larkin Y. and Michaely R. (2019), “Are US Industries Becoming More Concentrated?”, Review of Finance, 23 (4), pp. 697-743.
Güven A. and Turanlı S. (2014), “Skill-Biased Technological Change Hypothesis with Different Market Structures: The Case of Turkish Manufacturing Industries”, Anadolu Üniversitesi Sosyal Bilimler Dergisi, 14 (1), p. 17-29.
Hall P. and Soskice D. (ed.). (2001), Varieties of Capitalism. Oxford: Oxford University Press.
Hanke J.E. and Wichern D. (2014), Business Forecasting. New Jersey: Pearson.
Hartzell J. and Starks L. (2003), “Institutional Investors and Executive Compensation”, Journal of Finance, 58, pp. 2351-2374.
Heise A. (1997), “Wage Differentials Between Skilled and Unskilled Workers”, Jahrbücher für Nationalökonomie und Statistik, 216 (3), pp. 368-372.
Heise A. (2019), “Neo-Kaleckian and neo-Marxian regime research: A promising scientific research programme or a scientific cul-de-sac?”, ZÖSS Discussion Paper 74.
Hjalmarsson E. and Österholm P. (2007), “A Residual-Based Cointegration Test for Near Unit Root Variables”, FRB International Finance Discussion Paper, No. 907, available at SSRN: https://ssrn.com/abstract=1066746.
Henley A. (1987), “Trades Unions, Market Concentration and Income Distribution in United States Manufacturing Industry”, International Journal of Industrial Organization, 5 (2), pp. 193-210.
Herr H., Ruoff B. and Salas C. (2014), “Labour Markets, Wage Dispersion and Union Policies”, International Journal of Labour Research, 6 (1), pp. 57-74.
Hodson R. (1983), Workers' Earnings and Corporate Economic Structure. Academie Press.
Irfan M. (1979), “Effect of Unionization, Product Market Concentration and Foreign Trade on Inter-Industry Wage Structure”, The Pakistan Development Review, n. XVIII #1.
Jirjahn U. and Kraft K. (2007), “Intra-firm Wage Dispersion and Firm Performance – Is There a Uniform Relationship?”, Kyklos, 60 (2), pp. 231-253.
Jones J.C.H. and Laudadio L. (1975), “Wage Differentials and Market Imperfections: Some Cross Section Results in Canadian Manufacturing Industries”, Industrial Relations, 30 (3), pp. 408-423.
Kalleberg A.L, Wallace M. and Althauser R.P. (1981), “Economic Segmentation, Worker Power, and Income Inequality”, American Journal of Sociology, 87(3), pp. 651-683.
Kalecki M. (1954), Theory of Economic Dynamics. London: Allen & Unwin.
Kalecki M. (1971), Selected Essays on the Dynamics of the Capital Economy. Cambridge: Cambridge University Press.
Kalecki M. (1990), Collected Works of Michal Kalecki: Volume I. Capitalism: Business Cycles and Full Employment, edited by Jerzy Osiatynski. Oxford: Clarendon Press.
Katırcıoğlu E. (1989), “Türkiye Imalat Sanayinde Yoğunlaşma ve Yoğunlaşmayı Belirleyen Faktörler, 1975 -1985” [Concentration and Factors Determines Concentration in Turkish Manufacturing Industry, 1975-1985], TÜSES Araştırma Vakfı Yayını.
Kato M., Mittnik S., Samaan D. and Semmler W. (2015), “Employment and Output Effects of Climate Policies”, The Oxford Handbook of the Macroeconomics of Global Warming, edited by L. Bernard and W. Semmler. New York: Oxford University Press.
Katz L.F. (1999), “Technological Change, Computerization, and the Wage Structure”, available at: http://scholar.harvard.edu/files/lkatz/files/technological_change_computerization_
and_the_wage_structure.pdf (Date of Access: 05.09.2016).
Kelly T., Liaplina A., Tan S.W. and Winkler H. (2017), “Reaping Digital Dividends: Leveraging the Internet for Development in Europe and Central Asia. World Bank”, available at: https://www.worldbank.org/en/region/eca/publication/digital-dividends-in-eca (Date of Access: 22.03.2017).
Keynes J.M. (1936), The General Theory of Employment, Interest and Money. New York, USA: Macmillan.
Kim Y.K. (2016), “Macroeconomic Effects of Household Debt: An Empirical Analysis”, Review of Keynesian Economics, 4 (2), pp. 127-150.
King J. and Regan P. (1976), Relative Income Shares. London: Macmillan.
Kriesler P. (1987), Kalecki's Microanalysis: The Development of Kalecki's Analysis of Pricing and Distribution. Cambridge: Cambridge University Press.
Kristal T. and Cohen Y. (2016), “The Causes of Rising Wage Inequality: The Race Between Institutions and Technology”, Socio-Economic Review, 14 (2), pp. 1-26.
Lee F. (1999), Post Keynesian Price Theory. Cambridge: Cambridge University Press.
Lemieux T. (2008), “The changing nature of wage inequality”, Journal of Population Economics, 21 (1), pp. 21-48.
Liew, V.K.-S. (2004) “Which Lag Length Selection Criteria Should We Employ?”, Economics Bulletin, 3 (33), pp. 1-9.
Lin K. and Tomaskovic-Devey D. (2013), “Financialization and US Income Inequality, 1970-2008”, American Journal of Sociology, 118 (5), pp. 1284–1329.
Minsky H.P. (1975), John Maynard Keynes. New York: Columbia University Press.
Minsky H.P. (1986), Stabilizing an Unstable Economy. New Haven, CT: Yale University Press.
Mishel L. (2012), “The decline of collective bargaining and the erosion of middle-class incomes in Michigan”, available at: http://www.epi.org/publication/bp347-collective-bargaining/ (Date of Access: 05.12.2016).
Mishel L. (2014), “Low-Wage Workers Have Far More Education Than They Did in 1968, Yet They Make Far Less”, available at: http://www.epi.org/publication/wage-workers-education-1968/ (Date of Access: 10.02.2014).
Murphy K. (2013), “Executive Compensation: Where We Are, and How We Got There”, in Handbook of the Economics of Finance, edited by G.M. Constantinides, M. Harris and R. M. Stulz, Vol. 2 (Part A). Amsterdam: Elsevier.
Nekarda C.J. and Ramey V.A. (2013), “The Cyclical Behavior of the Price-Cost Markup”, NBER Working Paper, n. 19099, Cambridge (MA): National Bureau of Economic Research.
Orhangazi Ö. (2018), “The role of intangible assets in explaining the investment–profit puzzle”, Cambridge Journal of Economics, 43 (5), pp. 1251-1286.
Palley T.I. (2006), “Bringing Class Back to Cambridge: Class Conflict and the Cambridge Theory of Income Distribution”, in Wages, Employment, Distribution, and Growth, edited by E. Hein, A. Heise and A. Truger. New York: Palgrave Macmillan.
Palley T.I. (2015), “The Middle Class in Macroeconomics and Growth Theory: A Three-Class Neo-Kaleckian–Goodwin Model”, Cambridge Journal of Economics, 39 (1), pp. 221-243.
Pierce B. (2001), “Compensation Inequality”, The Quarterly Journal of Economics, 116 (4), pp. 1493-1525.
Roach B. (2007). “Corporate power in a global economy”, Global Development and Environment Institute, Tufts University.
Rugitsky F.M. (2013), “Degree of Monopoly and Class Struggle: Political Aspects of Kalecki's Pricing and Distribution Theory”, Review of Keynesian Economics, 1 (4), pp. 447-464.
Sawyer M. (1981), The Economics of Industries and Firms. London: Croom Hell London.
Sawyer M. (1985), Economics of Kalecki. Armonk, New York: M.E. Sharpe.
Shapiro N. (2005), “Competition and aggregate demand”, Journal of Post Keynesian Economics, 27 (3), pp. 541-549.
Sharp G.D. (2010), “Lag Length Selection for Vector Error Correction Models”, unpublished PhD thesis, Rhodes University, available at: https://core.ac.uk/download/pdf/145047426.pdf.
Shepherd G.W. (1997), The Economics of Industrial Organization. Prospect Heights, Illinois: Waveland Press.
Shin T. (2014), “Explaining Pay Disparities Between Top Executives and Nonexecutive Employees: A Relative Bargaining Power Approach”, Social Forces, 92 (4), pp. 1339–1372.
Sylos L.P. (1962), Oligopoly and Technical Progress. Cambridge, Massachusetts: Harvard University Press.
Sjöberg O. (2009), “Corporate Governance and Earnings Inequality in the OECD Countries 1979-2000”, European Sociological Review, 25 (5), pp. 519-533.
Steindl J. (1952), Maturity and Stagnation in American Capitalism. Oxford: Basil Blackwell.
Steindl J. (1990), Economic Papers 1941-88. New York: St. Martin's Press.
Tachibanaki T. (1997), Wage Differentials: An International Comparison. New York: Macmillian Press.
Tarassow A. (2010), “The Empirical Relevance of Goodwin’s Cycle Model for the US Economy”, PRAG Discussion Paper, n. 5, available at: https://www.wiso.uni-hamburg.de/fachbereich-sozoek/professuren/heise/zoess /forschung/forschungsfelder/forschungsfeld-iii-bildung-und-weiterbildung/prag-05.pdf (Date of Access: 12.06.2016).
Tingvall P.G. (2006), “Is There Really an Inverted U-shaped Relation Between Competition and R&D?”, available at: http://swopec.hhs.se/eijswp/papers/eijswp0207.pdf (Date of Access: 22.11.2012).
Toporowski J. (2005), “Methodology and Industrial Maturity in Steindl’s Capitalism”, pp. 92-108 in Rethinking Capitalist Development: Essays on the Economics of Josef Steindl, edited by T. Mott and N. Shapiro. London and New York: Routledge.
Toporowski J. (2016), “Kalecki and Steindl in the Transition to Monopoly Capital”, Monthly Review, 68 (03), available at: http://monthlyreview.org/2016/07/01/kalecki-and-steindl-in-the-transition-to-monopoly-capital/ (Date of Access: 01.09.2016).
Tosi H.L., Werner S., Katz J.P. and Gomez-Mejia L.R. (2000), “How Much Does Performance Matter? A Meta-Analysis of CEO Pay Studies”, Journal of Management, 26 (2), pp. 301-339.
Van Reenen J. (2011), “Wage Inequality, Technology and Trade: 21st Century Evidence”, Labour Economics, vol. 18, pp. 730-741.
Vasudevan R. (2015), “Financialization, Distribution, and Accumulation: A Circuit of Capital Model with a Managerial Class”, Metroeconomica, 67 (2), pp. 397-428.
Wallerstein M. (1999), “Wage-Setting Institutions and Pay Inequality in Advanced Industrial Societies”, American Journal of Political Science, (43), pp. 649-680.
Wallerstein M. and Western B. (2000), “Unions in Decline? What has Changed and Why?” Review of Political Science, (3), pp. 355-377.
Wilmers N. (2017), “Does Consumer Demand Reproduce Inequality? High-Income Consumers, Vertical Differentiation, and the Wage Structure”, American Journal of Sociology, 123 (1), pp. 178-231.
Wilmers N. (2018), “Wage Stagnation and Buyer Power: How Buyer-Supplier Relations Affect U.S. Workers’ Wages, 1978 to 2014”, American Sociological Review, 83 (2), pp. 213- 242.
Wright E.O. (1979), Class Structure and Income Determination. New York: Academic Press.
Wright E.O., Costello C., Hachen D. and Sprague J. (1982), “The American Class Structure”, American Sociological Review, 47 (6), pp. 709-726.
Wright E.O. and Dwyer R. (2003), “The Patterns of Job Expansions in the USA: A Comparison of the1960s and 1990s”, Socio-Economic Review, (1), pp. 289-325.
http://stateofworkingamerica.org/ (Date of Access: between 19.04.2016 and 01.12.2016)census.gov (Date of Access: 29.08.2016)
http://www.bls.gov/cex/csxstnd.htm (Date of Access: 29.08.2016)
https://fred.stlouisfed.org/ (Date of Access: April-June 2019)
http://www.epi.org/data (Date of Access: 31.10.2016)
http://www.census.gov/ces/dataproducts/bds/data_firm.html (Date of Access: 03.11.2016)