#1364 1994 · Safelite Glass · Auto services
Safelite switched glass installers to per-windshield pay with a floor — output rose 44%
问题
Hourly-paid windshield installers had no reason to fit more than a few units a day, and the firm couldn't tell slow from unlucky
背景
Safelite, the largest US auto-glass company, paid its mobile installers by the hour in the early 1990s. Hourly pay in field service has a known pathology: effort is unobservable (the installer is alone in a van), so pace drifts to the comfortable minimum, and the payroll cannot distinguish a slow worker from one who drew long drives and difficult jobs. Installers averaged roughly 2-3 windshields a day, and management suspected the number said more about incentives than about windshields.
The classical fix — piece rates — was well known and widely distrusted: workers fear rate cuts once they perform, resent income risk from slow days they don't control, and quality can collapse when speed alone pays. CEO Garen Staglin and president John Barlow's design confronted the distrust directly rather than pretending it away.
换别人会怎么做
Manage harder within hourly pay: GPS the vans, set daily quotas, ride-along audits, dismiss the slowest decile. Each buys a little pace at the price of surveillance and morale, and none changes the fundamental fact that the marginal windshield pays the installer nothing.
他们看到了什么
Hourly pay made effort invisible and the marginal unit worthless to the worker. Pricing the unit — with a floor absorbing bad-luck risk and unpaid rework pricing in quality — moved output 44%, and half the gain came from who the new deal attracted.
那一手
From 1994 Safelite rolled out 'Performance Pay Plan': installers earned a rate per windshield installed, with a guaranteed hourly floor so a bad draw of jobs couldn't crater a paycheck, and re-installation of any defective work done unpaid — pricing quality into the piece rate. The floor was the adoption device: it removed the downside that makes workers fight piece rates, while the upside pulled effort and — just as importantly — changed who wanted to work at Safelite, as fast installers were now paid like fast installers. Economist Edward Lazear got the personnel records and published the result in the American Economic Review: output per worker rose about 44%, roughly half from the same workers speeding up and half from the workforce recomposing toward high performers, with pay up ~10% and profits up too.
为什么管用
The piece rate makes the worker the residual claimant on their own pace, so effort no longer needs observing — the paycheck audits it. The guaranteed floor is what makes the scheme adoptable: it converts 'income risk transferred to workers' into 'upside offered to workers', which flips resistance into sorting — fast installers apply, slow ones drift away, and the workforce itself becomes the compounding asset. Unpaid rework closes the quality loophole that sank naive piece-rate schemes, and the AER documentation means the whole causal chain is measured, not asserted.
值了多少
Output per installer rose ~44% — half incentive effect, half self-selection — pay rose ~10%, profits rose; documented in Lazear's AER 2000 study.
什么时候会失灵
It fails where output is hard to count or quality is hard to attribute (team production, judgment work), where demand is too thin for workers to control their throughput (the floor then just becomes the wage), and wherever management yields to the temptation that historically killed piece rates: cutting the rate once workers earn 'too much', which teaches everyone to slow back down permanently.
后来呢
Became the foundational natural experiment of personnel economics — the standard evidence that pay design changes both behaviour and workforce composition, taught in every labour economics course.
资料来源
- [1]Performance Pay and ProductivityAmerican Economic Review (Lazear), 2000aeaweb.org
- [2]Performance Pay at Safelite Auto Glass (A) — HBS caseHarvard Business School, 2001hbs.edu
- [3]Performance Pay and Productivity (working paper PDF)Lazear, AER working copy, 2000checchi.economia.unimi.it