Why is the labor share of income stable in Switzerland?
Real wages have risen only moderately in recent years in many advanced economies. As a result, the labor share, that is, the proportion of national income that is paid to labor, has been declining in most advanced economies. In the 1970s, employees earned around two-thirds of total national income. Since then, this proportion has decreased by approximately 5 to 10 percentage points in many countries. There is a common perception that labor is losing against capital. Under this interpretation, the global decline of labor share implies an increase in capital share, namely, the proportion of national income that goes to capital.
However, such a shift from labor to capital is difficult to observe in the data. Recent studies have found that the fall in labor share has not been offset by a rise in capital share . These results suggest that decreases in both the capital and the labor shares were offset by an increase in so-called “factorless” income, which cannot be readily attributed to either capital or labor. The increase in factorless income may reflect increased compensation to unmeasured input factors, in particular intangible capital such as organizational competencies, R&D, or brands. Since intangible investment can secure intellectual property rights and strengthen brands, it is also liable to limit competition and guarantee higher profits.
We try to estimate the evolution of the Swiss capital and factorless income shares since the 1990s by using a methodology derived by Barkai (2016) . Our findings indicate that capital and factorless income shares have changed substantially in the last decades. Capital deepening has been very weak in Switzerland, although interest rates have fallen considerably. As a result, the capital share has decreased substantially. This decline in capital share has been offset by an increase in factorless income share. The labor share, in contrast, has remained roughly stable over time. This has occasionally been associated with mainly positive factors, such as the high level of education in Switzerland .
Based on our findings and our interpretation of the data, we suggest another possible interpretation of the recent evolution of the labor share. We do not observe high wage growth or labor productivity increase in the data. While low productivity growth is a global phenomenon, labor productivity growth in Switzerland has been even lower than in several other advanced economies. According to data from the Federal Statistical Office, real wage growth was 0.6% between 1996 and 2015, while yearly labor productivity growth was only 1%. Instead, the constancy of the Swiss labor share is due to weak investment and labor productivity growth. In addition, the Swiss labor force has seen a considerable increase driven by high immigration levels starting in the 2000s. Weak investment growth has even led to a decline in the capital-to-output ratio, meaning the economy has become less capital-intensive. Weak growth in capital income may therefore explain the constancy of the Swiss labor share of income.
There are, however, two areas that outperformed the rest of the Swiss economy in terms of productivity: the pharmaceutical and chemical industries . Driven by a high degree of innovation, average productivity growth in these industries was at around 5% between 1996 and 2015, according to data from the Federal Statistical Office. High innovation and investment in capital stock, as well as high efficiency, are the reasons for their good performance. Outside of the pharmaceutical and chemical industries, productivity growth and capital deepening in Switzerland were weak.
Therefore, even if Switzerland has managed to be one of the few advanced economies with a stable labor share in the past years, it is not clear whether this trend will continue against the backdrop of weak investment and productivity growth. Above all, it is now essential to promote investment in tangible and intangible capital to increase productivity while also providing people with the skills needed to work efficiently with new technology.
 See, for example, Barkai, S., “Declining Labor and Capital Shares”, University of Chicago, 2016; Karabarbounis, L.. and Neiman, B. (2013): “The Global Decline of the Labor Share”, The Quarterly Journal of Economics, 129(1), 61-103.
 Barkai, S. (2016): “Declining Labor and Capital Shares.” University of Chicago; Baldi, G. and Pons, M. (2019): "The Evolution of Factor Shares: Evidence from Switzerland.", GLO Discussion Paper Series 324, Global Labor Organization (GLO).
 Bundesrat (2018): Eine Prospektivstudie über die Auswirkungen der Robotisierung in der Wirtschaft auf das Steuerwesen und auf die Finanzierung der Sozialversicherungen, Bericht des Bundesrates in Erfüllung des Postulats 17.3045 Schwaab vom 1. März 2017. Siegenthaler, M. and Stucki, T. (2014): Dividing the pie: the determinants of labor’s share of income on the firm level. KOF Working Paper Nr. 352, February 2014. Siegenthaler and Stucki also mention the “relatively slow-rate of technological progress” in Switzerland as another reason for the stable labor share.
 See also BAK Basel Economics, Grass, M. , and Mösle, S. (2015): “Bedeutung der Pharmaindustrie für die Schweiz.”
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