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Labour economicsChapter 5: Compensating wage differentials

Job amenities, health benefits and layoffs

Key facts

Key facts

ΔwΔH∣isoprofit=−1\displaystyle \left.\frac{\Delta w}{\Delta H}\right|_{\text{isoprofit}} = -1
Course
Labour economics, ECON 331
Textbook
Borjas, chapter 5
Practise this topic (14)

A job amenity is a non-wage characteristic workers value, such as a flexible schedule, employer-paid health benefits or steady work; a disamenity is one they dislike, such as night shifts or predictable layoffs. Holding a worker’s productivity fixed, jobs with more amenities pay lower wages. Estimated differentials often have the opposite sign, because productivity and tastes are hard to hold fixed in data.

A job offers a package: a wage plus amenities. Workers compare packages, and firms can pay in either currency. A firm with a pleasant workplace, a predictable schedule or generous benefits can attract workers at a lower wage; a job with disamenities, such as rotating night shifts, long commutes or weeks in a remote work camp, must pay more. The logic is the one behind compensating differentials for risk: the differential compensates the marginal worker.

Taxes tilt the mix. Wages are taxed; many amenities are not. In Canada an employer’s contributions to a private health services plan are not a taxable benefit for the employee.1 A higher income tax rate lowers the after-tax value of a dollar of wages but not of an untaxed benefit, so workers shift toward amenity-rich packages.

Why estimated differentials often have the wrong sign

Section titled “Why estimated differentials often have the wrong sign”

Apart from the risk of death, the evidence that bad jobs pay more is weak: wrong-signed or insignificant estimates are common.2 Two reasons:

  1. Unobserved ability. A more productive worker generates more value and receives more total compensation, which she takes partly as wages and partly as amenities. If the data measure productivity poorly, high wages and good amenities appear together, even though for any one worker more amenities cost wages.
  2. Preferences of the marginal worker. Heavy outdoor work looks unpleasant to most people. But if enough workers enjoy it to fill those jobs, the marginal worker needs little or no premium. The premium depends on the tastes of the people who take the job, not of the average person.

The standard fix is to follow the same workers as they change jobs. A worker’s ability and tastes move with her, so the change in her wage when the job’s characteristics change isolates the differential. The method helps but is no cure: job changes can themselves be driven by things the data miss, and differencing magnifies measurement error. An early study using US panel data on young men found that the estimates did not become markedly more plausible, though the premium for fatal risk was positive and significant.23

Put annual health benefits HH on the horizontal axis and the annual wage ww on the vertical axis. A dollar of benefits costs the firm a dollar, so an isoprofit line for a given worker has slope −1-1. Workers value both wages and benefits, so their indifference curves slope down and are convex.

Wage-benefit trade-off: equally productive vs more productive workersIsoprofit lines with slope minus one in wage-benefit space. Equally productive workers A and B share one isoprofit line, so their choices reveal the true trade-off of one dollar of wages per dollar of benefits; B*, who is more productive, sits on a higher line with both more pay and more benefits, so comparing B with B* shows a positive wage-benefit relationship.
Wage gap, B* minus B
$8.0k
Benefit gap, B* minus B
$2.0k
True trade-off on one isoprofit line (wage per $1 of benefits)
−$1.00
Figure 1. Equally productive workers A and B face the same isoprofit line, along which each $1 of benefits costs $1 of wages: A takes all pay as wages and B takes $5,000 of benefits and a $45,000 wage. B*, $10,000 more productive, takes $7,000 of benefits and a $53,000 wage, so comparing B with B* suggests that benefits come with higher pay.
  • Worker A, for example young and healthy, values coverage little. His indifference curve is flatter than the isoprofit line at the no-benefits corner, so he takes the highest wage and no benefits.
  • Worker B values coverage and chooses the tangency, with benefits HBH_B and a lower wage wBw_B. A and B together reveal the true trade-off: one dollar of wages per dollar of benefits.
  • Worker B* has B’s tastes but higher productivity, so firms can offer B* more of everything at zero profit. B* sits on a higher isoprofit line with both a higher wage and more benefits.

Comparing B with B* shows wages and benefits rising together. That positive correlation comes from productivity, not from the trade-off, and it is the empirical problem in miniature: unless productivity is well measured, the data can reject a theory that is true.

Steady work is also an amenity. Smith observed that a mason or bricklayer “can work neither in hard frost nor in foul weather”, so what he earns while employed “must not only maintain him while he is idle, but make him some compensation for those anxious and desponding moments”.4

Use the work-leisure model. A worker with total time TT who can choose her hours at wage w0w_0 picks h0h_0 hours, where her indifference curve U0U_0 is tangent to the budget line (point P). A seasonal job offers the same work but, because of layoffs known in advance, only h1<h0h_1 < h_0 hours a year. At wage w0w_0 that bundle is on her budget line but was not chosen, so it is on a lower indifference curve. To attract her, the seasonal job must pay a higher wage w1w_1 that puts the point with h1h_1 hours back on U0U_0.

Seasonal job: compensating differential with and without employment insuranceA worker chooses 2,000 hours of work at $30 an hour (point P on U0). A seasonal job with predictable layoffs offers fewer hours, so at the same wage she is worse off; the job must pay w1 to reach U0 at point Z, and EI benefits paid during layoffs lower the w1 it must pay.
Wage the seasonal job must pay, w1
$31.74
Compensating differential, w1 − w0
$1.74
EI benefits during layoffs
$0.0k
Figure 2. A worker who chooses 2,000 hours a year at $30 an hour (P) would be worse off in a seasonal job offering 1,500 hours at the same wage. Without employment insurance the seasonal job must pay $31.74 to keep her on U0U_0; with EI replacing 55 percent of lost earnings during layoffs it needs to pay only $26.82.

Two results follow. The seasonal wage must exceed w0w_0, because the hours constraint binds. It need not keep annual earnings constant, because the worker gets some value from the extra leisure. The argument assumes the layoffs are anticipated. Layoffs that come as a surprise impose risk rather than predictable idleness, and the model does not price them in the same way.

Employment insurance. Canada’s EI pays 55 percent of average insurable weekly earnings, up to $729 a week in 2026, for 14 to 45 weeks; qualifying takes 420 to 700 hours of insurable work, depending on the regional unemployment rate.56 Self-employed fishers have their own EI fishing benefits.7 Benefits paid during an expected layoff do part of the work the higher wage would otherwise do, so the compensating differential for seasonal work shrinks. Premium rates are set nationally, in 2026 $1.63 per $100 of insurable earnings for employees ($1.30 in Quebec) and 1.4 times that for employers, and do not depend on an employer’s layoff record.8 EI therefore replaces part of a private arrangement between seasonal employers and their workers with a public one financed in part by stable employers and their workers. See job search and employment insurance.

  1. The wage-benefit trade-off. The isoprofit line for workers A and B is w+H=50,000w + H = 50{,}000. A chooses H=0H = 0 and w=50,000w = 50{,}000; B chooses H=5,000H = 5{,}000 and w=45,000w = 45{,}000. Between them, Δw/ΔH=−5,000/5,000=−1\Delta w / \Delta H = -5{,}000 / 5{,}000 = -1.

  2. The productivity trap. B* is $10,000 more productive: w+H=60,000w + H = 60{,}000. B* chooses H=7,000H = 7{,}000 and w=53,000w = 53{,}000. A researcher comparing B and B* finds Δw/ΔH=8,000/2,000=+4\Delta w / \Delta H = 8{,}000 / 2{,}000 = +4, the wrong sign.

  3. Bounds on the seasonal wage. A worker chooses 2,000 hours at $30 an hour, earning $60,000. A seasonal job offers 1,500 hours. It must pay more than $30, or she is worse off, and less than 60,000/1,500=4060{,}000 / 1{,}500 = 40 dollars, at which she would have the same earnings and 500 more hours of leisure.

  4. The exact wage. Let utility be U=C0.4L0.6U = C^{0.4} L^{0.6} with T=5,000T = 5{,}000 hours. With no other income she works 40 percent of her time, 2,000 hours, and U0=60,0000.4×3,0000.6U_0 = 60{,}000^{0.4} \times 3{,}000^{0.6}. In the seasonal job she has 3,500 hours of leisure and needs consumption C1C_1 with C10.4×3,5000.6=U0C_1^{0.4} \times 3{,}500^{0.6} = U_0, so C1=60,000×(3,000/3,500)0.6/0.4=60,000×0.7936=47,614C_1 = 60{,}000 \times (3{,}000 / 3{,}500)^{0.6/0.4} = 60{,}000 \times 0.7936 = 47{,}614 dollars. So w1=47,614/1,500=31.74w_1 = 47{,}614 / 1{,}500 = 31.74 dollars: a compensating differential of $1.74 an hour.

  5. Adding EI. If EI replaces 55 percent of the earnings lost during the 500 hours of layoff, income is 1,500w1+0.55×500×w1=1,775w11{,}500 w_1 + 0.55 \times 500 \times w_1 = 1{,}775 w_1. Setting this equal to $47,614 gives w1=26.82w_1 = 26.82 dollars, below the steady job’s wage.

Exercise: a longer layoff

With only 1,000 hours of work and no EI, C1=60,000×(3,000/4,000)1.5=38,971C_1 = 60{,}000 \times (3{,}000/4{,}000)^{1.5} = 38{,}971 dollars, so w1=38.97w_1 = 38.97 dollars: a differential of $8.97. Longer anticipated layoffs need larger differentials, rising more than in proportion.

Valuing amenities directly. Mas and Pallais built the choice into the hiring process of a national call centre, offering applicants positions that differed in schedule and pay. Most applicants would pay nothing for flexibility, but a minority valued it highly. On average, applicants would give up 20 percent of wages to avoid a schedule set by the employer on short notice and 8 percent for the option to work from home.9 Because the researchers designed the choices, the estimates do not depend on comparing workers of different ability.

Danger. A study of Swedish men that used workers’ own reports of whether their job was dangerous found a significant premium of about 2 percent of wages for dangerous work.3

Layoffs. Abowd and Ashenfelter estimated compensating differentials for anticipated unemployment ranging from less than 1 percent in industries with little anticipated unemployment to over 14 percent in industries with substantial anticipated unemployment and unemployment risk.10

1.

Across a large sample of workers, jobs with generous benefits also tend to pay higher wages. Within the compensating-differentials framework, what is the likeliest explanation?

2.

Workers B and B* have the same preferences, but B* is more productive. B gets a $45,000 wage and $5,000 of health benefits; B* gets a $53,000 wage and $7,000 of benefits. What explains the positive relationship between wages and benefits in these two observations?

Wage-benefit trade-off: equally productive vs more productive workersIsoprofit lines with slope minus one in wage-benefit space. Equally productive workers A and B share one isoprofit line, so their choices reveal the true trade-off of one dollar of wages per dollar of benefits; B*, who is more productive, sits on a higher line with both more pay and more benefits, so comparing B with B* shows a positive wage-benefit relationship.
Wage gap, B* minus B
$8.0k
Benefit gap, B* minus B
$2.0k
True trade-off on one isoprofit line (wage per $1 of benefits)
−$1.00
3.

A worker who freely chooses 2,000 hours a year at $25 an hour is offered a seasonal job with predictable layoffs: same work, but only 1,600 hours a year. To attract her, what hourly wage must the seasonal job pay?

Practise more questions on this topic

  1. Canada Revenue Agency, Employer’s guide: Taxable benefits and allowances (T4130), section on private health services plans. ↩

  2. Brown, C. (1980). Equalizing differences in the labor market. Quarterly Journal of Economics, 94(1), 113 to 134. ↩ ↩2

  3. Viscusi, W. K. and Aldy, J. E. (2003). The value of a statistical life: A critical review of market estimates throughout the world. Journal of Risk and Uncertainty, 27(1), 5 to 76, which summarizes Brown (1980) and Duncan, G. J. and Holmlund, B. (1983), Was Adam Smith right after all? Another test of the theory of compensating wage differentials, Journal of Labor Economics, 1(4), 366 to 379. NBER working paper 9487. ↩ ↩2

  4. Smith, A. (1776). An Inquiry into the Nature and Causes of the Wealth of Nations, Book I, chapter 10. Project Gutenberg edition. ↩

  5. Government of Canada, EI regular benefits: How much you could receive. ↩

  6. Government of Canada, EI regular benefits: Eligibility. ↩

  7. Government of Canada, EI fishing benefits. ↩

  8. Canada Revenue Agency, EI premium rates and maximums. ↩

  9. Mas, A. and Pallais, A. (2017). Valuing alternative work arrangements. American Economic Review, 107(12), 3722 to 3759. ↩

  10. Abowd, J. M. and Ashenfelter, O. (1981). Anticipated unemployment, temporary layoffs, and compensating wage differentials. In S. Rosen (ed.), Studies in Labor Markets. University of Chicago Press. NBER chapter page. ↩