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R&D intensity and income inequality in the G7: 1870–2016

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  • Sefa Awaworyi Churchill
  • Bin Peng
  • Russell Smyth
  • Quanda Zhang

Abstract

We examine how R&D has contributed to income inequality in the Group of Seven countries from 1870 to 2016. Using newly developed panel data models that incorporate interactive fixed effects, we find that R&D is negatively associated with income inequality. Non‐parametric models that allow us to capture the time‐varying effect of R&D suggest that this average effect has been negative for most of this period. We find that economic growth and trade are important mechanisms through which R&D transmits to income inequality.

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  • Sefa Awaworyi Churchill & Bin Peng & Russell Smyth & Quanda Zhang, 2022. "R&D intensity and income inequality in the G7: 1870–2016," Scottish Journal of Political Economy, Scottish Economic Society, vol. 69(3), pages 263-282, July.
    • Handle: RePEc:bla:scotjp:v:69:y:2022:i:3:p:263-282
    DOI: 10.1111/sjpe.12298
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    as
    1. Sefa Awaworyi Churchill, 2017. "Fractionalization, entrepreneurship, and the institutional environment for entrepreneurship," Small Business Economics, Springer, vol. 48(3), pages 577-597, March.
    2. Ugur, Mehmet & Churchill, Sefa Awaworyi & Luong, Hoang M., 2020. "What do we know about R&D spillovers and productivity? Meta-analysis evidence on heterogeneity and statistical power," Research Policy, Elsevier, vol. 49(1).
    3. M. Hashem Pesaran, 2006. "Estimation and Inference in Large Heterogeneous Panels with a Multifactor Error Structure," Econometrica, Econometric Society, vol. 74(4), pages 967-1012, July.
    4. Antonelli, Cristiano & Gehringer, Agnieszka, 2017. "Technological change, rent and income inequalities: A Schumpeterian approach," Technological Forecasting and Social Change, Elsevier, vol. 115(C), pages 85-98.
    5. Davis, Donald R., 1995. "Intra-industry trade: A Heckscher-Ohlin-Ricardo approach," Journal of International Economics, Elsevier, vol. 39(3-4), pages 201-226, November.
    6. Panizza, Ugo, 2002. "Income Inequality and Economic Growth: Evidence from American Data," Journal of Economic Growth, Springer, vol. 7(1), pages 25-41, March.
    7. Òscar Jordà & Moritz Schularick & Alan M. Taylor, 2017. "Macrofinancial History and the New Business Cycle Facts," NBER Macroeconomics Annual, University of Chicago Press, vol. 31(1), pages 213-263.
    8. Bai, Jushan & Kao, Chihwa & Ng, Serena, 2009. "Panel cointegration with global stochastic trends," Journal of Econometrics, Elsevier, vol. 149(1), pages 82-99, April.
    9. Daron Acemoglu, 1998. "Why Do New Technologies Complement Skills? Directed Technical Change and Wage Inequality," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 113(4), pages 1055-1089.
    10. Hsiao, Cheng & Mountain, Dean C & Illman, Kathleen Ho, 1995. "A Bayesian Integration of End-Use Metering and Conditional-Demand Analysis," Journal of Business & Economic Statistics, American Statistical Association, vol. 13(3), pages 315-326, July.
    11. Kapetanios, G. & Pesaran, M. Hashem & Yamagata, T., 2011. "Panels with non-stationary multifactor error structures," Journal of Econometrics, Elsevier, vol. 160(2), pages 326-348, February.
    12. Eli Berman & John Bound & Zvi Griliches, 1994. "Changes in the Demand for Skilled Labor within U. S. Manufacturing: Evidence from the Annual Survey of Manufactures," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 109(2), pages 367-397.
    13. Daron Acemoglu, 2002. "Directed Technical Change," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 69(4), pages 781-809.
    14. Henderson, Daniel J. & Kumbhakar, Subal C. & Parmeter, Christopher F., 2012. "A simple method to visualize results in nonlinear regression models," Economics Letters, Elsevier, vol. 117(3), pages 578-581.
    15. David H. Autor & David Dorn & Gordon H. Hanson, 2013. "The China Syndrome: Local Labor Market Effects of Import Competition in the United States," American Economic Review, American Economic Association, vol. 103(6), pages 2121-2168, October.
    16. Terje Wessel, 2005. "Industrial Shift, Skill Mismatch and Income Inequality: A Decomposition Analysis of Changing Distributions in the Oslo Region," Urban Studies, Urban Studies Journal Limited, vol. 42(9), pages 1549-1568, August.
    17. John Van Reenen, 1996. "The Creation and Capture of Rents: Wages and Innovation in a Panel of U. K. Companies," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 111(1), pages 195-226.
    18. David H. Autor & Lawrence F. Katz & Melissa S. Kearney, 2008. "Trends in U.S. Wage Inequality: Revising the Revisionists," The Review of Economics and Statistics, MIT Press, vol. 90(2), pages 300-323, May.
    19. Guido Cozzi & Silvia Galli, 2014. "Sequential R&D and blocking patents in the dynamics of growth," Journal of Economic Growth, Springer, vol. 19(2), pages 183-219, June.
    20. Rubin, Amir & Segal, Dan, 2015. "The effects of economic growth on income inequality in the US," Journal of Macroeconomics, Elsevier, vol. 45(C), pages 258-273.
    21. Bianchini, Stefano & Pellegrino, Gabriele, 2019. "Innovation persistence and employment dynamics," Research Policy, Elsevier, vol. 48(5), pages 1171-1186.
    22. Lindsay Oldenski, 2014. "Offshoring and the Polarization of the U.S. Labor Market," ILR Review, Cornell University, ILR School, vol. 67(3_suppl), pages 734-761, May.
    23. Cecilia García-Peñalosa & Stephen Turnovsky, 2006. "Growth and income inequality: a canonical model," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 28(1), pages 25-49, May.
    24. Robert M. Solow, 1956. "A Contribution to the Theory of Economic Growth," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 70(1), pages 65-94.
    25. Eli Bekman & John Bound & Stephen Machin, 1998. "Implications of Skill-Biased Technological Change: International Evidence," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 113(4), pages 1245-1279.
    26. Romer, Paul M, 1990. "Endogenous Technological Change," Journal of Political Economy, University of Chicago Press, vol. 98(5), pages 71-102, October.
    27. Philippe Aghion & Ufuk Akcigit & Antonin Bergeaud & Richard Blundell & David Hemous, 2019. "Innovation and Top Income Inequality," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 86(1), pages 1-45.
    28. Stephen Machin & John Van Reenen, 1998. "Technology and Changes in Skill Structure: Evidence from Seven OECD Countries," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 113(4), pages 1215-1244.
    29. Alberto Chong & Mark Gradstein, 2007. "Inequality and Institutions," The Review of Economics and Statistics, MIT Press, vol. 89(3), pages 454-465, August.
    30. Su, Liangjun & Ullah, Aman, 2008. "Local polynomial estimation of nonparametric simultaneous equations models," Journal of Econometrics, Elsevier, vol. 144(1), pages 193-218, May.
    31. Thomas Piketty & Emmanuel Saez, 2003. "Income Inequality in the United States, 1913–1998," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 118(1), pages 1-41.
    32. Sébastien Breau & Dieter F. Kogler & Kenyon C. Bolton, 2014. "On the Relationship between Innovation and Wage Inequality: New Evidence from Canadian Cities," Economic Geography, Taylor & Francis Journals, vol. 90(4), pages 351-373, October.
    33. Madsen, Jakob B. & Islam, Md. Rabiul & Doucouliagos, Hristos, 2018. "Inequality, financial development and economic growth in the OECD, 1870–2011," European Economic Review, Elsevier, vol. 101(C), pages 605-624.
    34. Gagliardi, Luisa, 2019. "The impact of foreign technological innovation on domestic employment via the industry mix," Research Policy, Elsevier, vol. 48(6), pages 1523-1533.
    35. A. B. Atkinson, 2004. "Income Tax and Top Incomes over the Twentieth Century," Hacienda Pública Española / Review of Public Economics, IEF, vol. 168(1), pages 123-141, march.
    36. Silvapulle, Param & Smyth, Russell & Zhang, Xibin & Fenech, Jean-Pierre, 2017. "Nonparametric panel data model for crude oil and stock market prices in net oil importing countries," Energy Economics, Elsevier, vol. 67(C), pages 255-267.
    37. A. B Atkinson & Andrew Leigh, 2013. "The Distribution of Top Incomes in Five Anglo-Saxon Countries Over the Long Run," The Economic Record, The Economic Society of Australia, vol. 89, pages 31-47, June.
    38. M. V. Posner, 1961. "International Trade And Technical Change," Oxford Economic Papers, Oxford University Press, vol. 13(3), pages 323-341.
    39. Uddin, Md. Main & Mishra, Vinod & Smyth, Russell, 2020. "Income inequality and CO2 emissions in the G7, 1870–2014: Evidence from non-parametric modelling," Energy Economics, Elsevier, vol. 88(C).
    40. Frederick Solt, 2020. "Measuring Income Inequality Across Countries and Over Time: The Standardized World Income Inequality Database," Social Science Quarterly, Southwestern Social Science Association, vol. 101(3), pages 1183-1199, May.
    41. Cheng Hsiao, 2007. "Panel data analysis—advantages and challenges," TEST: An Official Journal of the Spanish Society of Statistics and Operations Research, Springer;Sociedad de Estadística e Investigación Operativa, vol. 16(1), pages 1-22, May.
    42. Richard Baldwin & Philippe Martin, 1999. "Two Waves of Globalisation: Superficial Similarities, Fundamental Differences," Post-Print hal-03417560, HAL.
    43. Glaeser, Edward L., 1999. "Learning in Cities," Journal of Urban Economics, Elsevier, vol. 46(2), pages 254-277, September.
    44. Edward L. Glaeser & Matt Resseger & Kristina Tobio, 2009. "Inequality In Cities," Journal of Regional Science, Wiley Blackwell, vol. 49(4), pages 617-646, October.
    45. Lin, Faqin & Fu, Dahai, 2016. "Trade, Institution Quality and Income Inequality," World Development, Elsevier, vol. 77(C), pages 129-142.
    46. Chou, Chien-Fu & Talmain, Gabriel, 1996. "Redistribution and Growth: Pareto Improvements," Journal of Economic Growth, Springer, vol. 1(4), pages 505-523, December.
    47. Scully, Gerald W, 2003. "Optimal Taxation, Economic Growth and Income Inequality," Public Choice, Springer, vol. 115(3-4), pages 299-312, June.
    48. Ariél Pakes & Zvi Griliches, 1984. "Estimating Distributed Lags in Short Panels with an Application to the Specification of Depreciation Patterns and Capital Stock Constructs," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 51(2), pages 243-262.
    49. Degui Li & Jia Chen & Jiti Gao, 2011. "Non‐parametric time‐varying coefficient panel data models with fixed effects," Econometrics Journal, Royal Economic Society, vol. 14(3), pages 387-408, October.
    50. Wiston Adrián Risso & Edgar J. Sánchez Carrera, 2019. "On the impact of innovation and inequality in economic growth," Economics of Innovation and New Technology, Taylor & Francis Journals, vol. 28(1), pages 64-81, January.
    51. Diego Puga, 2002. "European regional policies in light of recent location theories," Journal of Economic Geography, Oxford University Press, vol. 2(4), pages 373-406, October.
    52. David Card & John E. DiNardo, 2002. "Skill-Biased Technological Change and Rising Wage Inequality: Some Problems and Puzzles," Journal of Labor Economics, University of Chicago Press, vol. 20(4), pages 733-783, October.
    53. Charles I. Jones & Jihee Kim, 2018. "A Schumpeterian Model of Top Income Inequality," Journal of Political Economy, University of Chicago Press, vol. 126(5), pages 1785-1826.
    54. Fontana, Roberto & Nuvolari, Alessandro & Shimizu, Hiroshi & Vezzulli, Andrea, 2013. "Reassessing patent propensity: Evidence from a dataset of R&D awards, 1977–2004," Research Policy, Elsevier, vol. 42(10), pages 1780-1792.
    55. Hasan, Iftekhar & Tucci, Christopher L., 2010. "The innovation-economic growth nexus: Global evidence," Research Policy, Elsevier, vol. 39(10), pages 1264-1276, December.
    56. Angus Chu & Guido Cozzi, 2018. "Effects of Patents versus R&D subsidies on Income Inequality," Review of Economic Dynamics, Elsevier for the Society for Economic Dynamics, vol. 29, pages 68-84, July.
    57. Hailemariam, Abebe & Smyth, Russell & Zhang, Xibin, 2019. "Oil prices and economic policy uncertainty: Evidence from a nonparametric panel data model," Energy Economics, Elsevier, vol. 83(C), pages 40-51.
    58. David H. Autor & Lawrence F. Katz & Alan B. Krueger, 1998. "Computing Inequality: Have Computers Changed the Labor Market?," The Quarterly Journal of Economics, President and Fellows of Harvard College, vol. 113(4), pages 1169-1213.
    59. Laura De Dominicis & Raymond J. G. M. Florax & Henri L. F. De Groot, 2008. "A Meta‐Analysis On The Relationship Between Income Inequality And Economic Growth," Scottish Journal of Political Economy, Scottish Economic Society, vol. 55(5), pages 654-682, November.
    60. Greenhalgh, Christine, 1990. "Innovation and Trade Performance in the United Kingdom," Economic Journal, Royal Economic Society, vol. 100(400), pages 105-118, Supplemen.
    61. Jushan Bai, 2009. "Panel Data Models With Interactive Fixed Effects," Econometrica, Econometric Society, vol. 77(4), pages 1229-1279, July.
    62. Shiyuan Pan & Tailong Li & Heng-fu Zou, 2012. "Patent Protection, Technological Change and Wage Inequality: Theory," CEMA Working Papers 537, China Economics and Management Academy, Central University of Finance and Economics.
    63. Alan Manning, 2004. "We Can Work It Out: the Impact of Technological Change on the Demand for Low Skill Workers," CEP Discussion Papers dp0640, Centre for Economic Performance, LSE.
    64. Henderson,Daniel J. & Parmeter,Christopher F., 2015. "Applied Nonparametric Econometrics," Cambridge Books, Cambridge University Press, number 9780521279680, September.
    65. repec:idb:brikps:39798 is not listed on IDEAS
    66. Giovanni Andrea Cornia & Sampsa Kiiski, 2001. "Trends in Income Distribution in the Post-World War II Period: Evidence and Interpretation," WIDER Working Paper Series DP2001-89, World Institute for Development Economic Research (UNU-WIDER).
    67. Meschi, Elena & Vivarelli, Marco, 2009. "Trade and Income Inequality in Developing Countries," World Development, Elsevier, vol. 37(2), pages 287-302, February.
    68. Mehmet Ugur & Sefa Awaworyi Churchill & Edna Solomon, 2018. "Technological Innovation And Employment In Derived Labour Demand Models: A Hierarchical Meta†Regression Analysis," Journal of Economic Surveys, Wiley Blackwell, vol. 32(1), pages 50-82, February.
    69. Alan Manning, 2004. "We Can Work It Out: The Impact of Technological Change on the Demand for Low‐Skill Workers," Scottish Journal of Political Economy, Scottish Economic Society, vol. 51(5), pages 581-608, November.
    70. Awaworyi Churchill, Sefa & Inekwe, John & Smyth, Russell & Zhang, Xibin, 2019. "R&D intensity and carbon emissions in the G7: 1870–2014," Energy Economics, Elsevier, vol. 80(C), pages 30-37.
    71. Elsie Echeverri‐Carroll & Sofia G. Ayala, 2009. "Wage differentials and the spatial concentration of high‐technology industries," Papers in Regional Science, Wiley Blackwell, vol. 88(3), pages 623-641, August.
    72. Isabel Casas & Jiti Gao & Bin Peng & Shangyu Xie, 2021. "Time‐varying income elasticities of healthcare expenditure for the OECD and Eurozone," Journal of Applied Econometrics, John Wiley & Sons, Ltd., vol. 36(3), pages 328-345, April.
    73. Kris Ivanovski & Sefa Awaworyi Churchill & John Inekwe, 2020. "Convergence in Income Inequality Across Australian States and Territories," Social Indicators Research: An International and Interdisciplinary Journal for Quality-of-Life Measurement, Springer, vol. 148(1), pages 127-142, February.
    74. Mark Crosby, 2000. "Patents, Innovation and Growth," The Economic Record, The Economic Society of Australia, vol. 76(234), pages 255-262, September.
    75. Ben Spies-Butcher, 2014. "Marketisation and the dual welfare state: Neoliberalism and inequality in Australia," The Economic and Labour Relations Review, , vol. 25(2), pages 185-201, June.
    76. Cheng Hsiao, 2007. "Rejoinder on: Panel data analysis—advantages and challenges," TEST: An Official Journal of the Spanish Society of Statistics and Operations Research, Springer;Sociedad de Estadística e Investigación Operativa, vol. 16(1), pages 56-57, May.
    77. Van Roy, Vincent & Vértesy, Dániel & Vivarelli, Marco, 2018. "Technology and employment: Mass unemployment or job creation? Empirical evidence from European patenting firms," Research Policy, Elsevier, vol. 47(9), pages 1762-1776.
    78. Neil Lee, 2011. "Are Innovative Regions More Unequal? Evidence from Europe," Environment and Planning C, , vol. 29(1), pages 2-23, February.
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