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UNIQA Capital Markets Weekly

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USA: The impatience of stock markets

  • We examine the link between wage growth and inflation.
  • Prices are rigid and adjust slowly.  A one %-age point rise in wages leads to 0.6 %-age points increase in prices of goods and services. It takes around one year for prices to fully adjust.

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USA: The impatience of stock markets

  • We examine the link between wage growth and inflation.
  • Prices are rigid and adjust slowly.  A one %-age point rise in wages leads to 0.6 %-age points increase in prices of goods and services. It takes around one year for prices to fully adjust.

Stock and bond markets plummeted following the release of the January US employment report on Friday 2nd February. Some commentators argued that this is not pure coincidence but investors’ fear of higher wages, higher inflation and higher treasury bond yields. The most important figures of the monthly report from the Bureau of Labor Statistics (BLS) are the non-farm payrolls job growth (NFP), the unemployment rate (UR) and the average hourly earnings (AHE). The prints in NFP (200.000 new jobs), the unemployment rate (4.1 %) were unexciting, while the AHE jumped to 2.9 % annual earnings growth and the release from the previous month was revised upward from 2.5 % to 2.7 %.  AHE are usually a volatile time series and it should be compared to other series measuring the earnings development (the Atlanta Fed median wage tracker and the quarterly Employment Cost Index are two prominent examples) and smoothed (6 months) for detecting trends in growth rates (Figure 1 - see pdf). While the level of the growth rate moved since around 2015, neither of three well-known wages measures shows a significant, sustained upward trend or acceleration.

How are wage trends distributed across skill occupations, educational degrees, sectors and age-cohorts; in other words: Who earns more? In Q4 2017, the median wage rose by 3.2 % annually, the 75th percentile of the wage distribution increased by 4.9 % while wages at the 25th percentile fell by 2.2 % annually. Workers in occupations requiring higher skills earned 3.6 % more, while middle and low skilled occupations saw their wage rise by 3.2 % and 2.8 % in the final quarter of last year. Workers with a bachelor’s degree or higher encountered highest earnings rises (3.6 %) compared to persons with college degree (3.0 %) or high school degree or less (3.1 %). Across sectors, wage growth was higher in public administration (3.8 %), trade (3.6 %) and finance & business (3.5 %). Manufacturing wages rose by 3.4 % and wage growth was lowest in leisure & hospitality (2.8 %). Finally wage growth is highest among younger cohorts aged 16 to 24 years (7.1 %) and lowest for the elderly aged above 55 years (2.0 %). This seems to mirror a cliché: The young, highly skilled working in finance & business (or public services) ripped off the largest earnings increases last year.
Rising wage growth is usually seen as a sign of increasing labor market tightness. A tighter labor market implies less slack in the economy. The relationship between economic slack and inflation is formally known as the Phillips Curve. Conditions that push the economy to full employment lead to increased cost pressures on firms and capacity constraints. Cost pressures lead to higher wages and labor costs. Capacity constraints and strained supply chains in the face of high demand push up intermediate costs. In response to these costs, firms tend to increase the prices they charge for their goods and services, leading to price inflation. Core CPI inflation (excluding volatile components such as food and energy) was 1.7 % (y/y) and the personal consumption expenditure (PCE) core price index was 1.5 % (y/y) in December (Figure 2 - see pdf).

Inflation expectations also affect the transmission of cost pressures to price inflation. If individual firms expect economy-wide prices to increase at a fast pace, they will be reluctant to slow their own price increases. If many firms follow the same reasoning and expect other firms to keep raising prices, then overall inflation will remain strong.
There is currently much uncertainty regarding the functioning of the Phillips Curve. In her last press conference as the chair of the Federal Reserve, J. Yellen recognizes “that there is uncertainty about what’s holding inflation down”. However, emphasizing the Open Market Committee’s belief of its transitory nature. Many have postulated that the Phillips Curve has ceased to exist, others have argued that the relationship has weakened over time and some argue that the relationship is well and alive.  We estimate a supply factor augmented New Keynesian Phillips Curve, which includes the output gap as a measure of economic slack, long term inflation expectations, lagged core CPI inflation, and the change in import prices. The results show an economically significant long-term effect of the output gap on US core inflation.  During the period 1990 to 2017, a rise in the output gap of 1 % is associated with a long-term increase of core inflation of 0.35 %-points. However, the short term, or same period, effect is relatively weak with 0.04 %-points only. Looking at the dynamics of this relationship by applying rolling two-stage least square regressions, shows that the effect of the output gap on U.S. core inflation has weakened but stayed constant for quite some time now (Figure 3 - see pdf). The short-term effect has declined from 0.06 %-points to 0.04 %-points, while the long-term effect has declined from 0.4 %-points to 0.2 %-points.  Hence, we share the view that the Phillips Curve is active, though, the transmission of economic slack on U.S. prices has weakened over time.

One argument for the weaker relationship is increased central bank credibility reflecting inflation expectations to have become more anchored. Sticky prices appear to incorporate expectations about future inflation to a greater degree than prices that change on a frequent basis. The ‘trimmed’ mean inflation index is constructed by excluding the items that registered the biggest increases or decreases in a given month, hence, it is an alternative measure of the underlying trend (Figure 4 - see pdf). These time series suggest that underlying price trends have not yet adapted to higher inflation expectations, except for shelter prices which have decoupled since 2013.

Vector autoregressive (VAR) models allow us to study relationships and dynamic effects of macroeconomic variables. We test the links between wages, inflation expectations and inflation rates in such a VAR model. From the above monthly time series, we include the Atlanta Fed median wage tracker (3-month average), the sticky price index and the core CPI index (all in y/y-changes) in the model with data since January 2000 (model 1). Alternatively, the trimmed mean PCE time series is included instead of the sticky price core CPI index (model 2).  Both time series usually gauge underlying price trends very well and are said to bear a forward-looking component. The impulse-response functions (IRFs in figure 5 - see pdf) examine 1 %-age points positive shock in wages and respective dynamic responses over a period of more than three years (40 months).
The dynamic effect of a wage increase is statistically significant, positive and unambiguous and cumulates to a rise in sticky prices of 0.6 %-age points after around one year. Hence, it takes some time for firms to adjust prices upwardly due to higher wages. Wages also effect the core CPI price index positively, although to a lesser extent (and not statistically significant), what seems plausible. Side note: 10-year treasury yields have no significant relationships to wages and prices in the model.
In this short paper, we take a closer look at several prominent indicators for the US wage development. While the level of wage growth has moved up since 2015, there is no consistent evidence for a short-term acceleration in the data. In addition, the short-term effect of labor market tightness on the overall inflation rate is alive but small and there is evidence that it has weakened over time. Finally, in case of higher wage growth, we sketch that it takes some time for inflation to adjust to higher wages.  

Authors
Martin Ertl                                    Franz Zobl
Chief Economist                          Economist
UNIQA Capital Markets GmbH   UNIQA Capital Markets GmbH

Disclaimer
This publication is neither a marketing document nor a financial analysis. It merely contains information on general economic data. Despite thorough research and the use of reliable data sources, we cannot be held responsible for the completeness, correctness, currentness or accuracy of the data provided in this publication.
Our analyses are based on public Information, which we consider to be reliable. However, we cannot provide a guarantee that the information is complete or accurate. We reserve the right to change our stated opinion at any time and without prior notice. The provided information in the present publication is not to be understood or used as a recommendation to purchase or sell a financial instrument or alternatively as an invitation to propose an offer. This publication should only be used for information purposes. It cannot replace a bespoke advisory service to an investor based on his / her individual circumstances such as risk appetite, knowledge and experience with financial instruments, investment targets and financial status. The present publication contains short-term market forecasts. Past performance is not a reliable indication for future performance.


 

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