Overview

A Census study of approximately 114,000 state contractors, including about 7,000 in five states that later banned affirmative action, finds that MWBE employment declined gradually relative to non-MWBE contractors: about 10.9% lower after five years. Effects were heterogeneous, including an approximately 18.8% relative decline for Black-owned businesses, while existing MWBEs were not detectably more likely to exit. The study identifies changed procurement access, not a transaction-level loss of contract revenue or a direct credit effect.

Learning outcomes

Five years after bans, MWBE contractors were approximately 10.9% smaller in employment relative to non-MWBE contractors in the study's comparison.
The response was heterogeneous: Black-owned firms had an approximately 18.8% relative employment decline, while several groups showed no statistically significant change.
The evidence concerns relative employment and access; it does not measure lost contract revenue, bank lending, or prove one cause of the decline.

Keywords

MWBEProcurementPreferencesEmploymentAccessBans

What Disappears When Preferences Disappear?

Government procurement is the subject of this case, and the specific question is what happens to minority- and women-owned contractors when a state removes affirmative-action preferences and support from public contracting. The answer helps test the broader access mechanism: a policy can change a firm's opportunity to receive government demand even when the available data do not record a loan. The reader's task is to interpret the resulting employment estimates as relative, delayed, and heterogeneous responses—not as a uniform verdict about every contractor or every affirmative-action program.

A contracting opportunity can be removed without closing a firm

The Census study treats public contracting as a market in which owner demographics historically influenced access to state-funded work. It defines a state contractor as a firm reporting that state and local government accounted for at least 10% of its sales. An MWBE—minority- and women-owned business enterprise—is identified from ownership information: minority ownership is based on reported race or ethnicity, and women-owned status on ownership by a woman. These definitions do not claim that every dollar of a firm's revenue came from a preference program. They identify firms with a meaningful state-government customer and an ownership category that the policy was designed to recognize.

The institutional change unfolded across several states rather than in one nationwide switch. California's Proposition 209 in 1996 was an early example of a state prohibition on considering race, sex, or ethnicity in matters involving state funds. The Census study focuses on five later treated states whose policies could be observed with the available data: Michigan, where the ban took effect in 2006; Nebraska in 2008; Arizona in 2010; and New Hampshire and Oklahoma in 2012. The study excludes states that had already banned affirmative action by the end of the sample period, allowing the comparison group to remain free of the same change during the relevant windows.

What disappeared was not identical in every state. Michigan had previously set goals for state expenditures awarded to women-owned and minority-owned businesses. In Arizona, state and local programs had supported participation by notifying MWBEs about opportunities, facilitating networking with officials, and offering certification training; the study reports that the ban made such programs illegal. In Nebraska, the change halted Omaha's Protected Business Enterprise Program, which had required contractors to outsource some work to MWBEs. These examples matter because “preference” can describe several routes into a public market: a scoring advantage, a set-aside, a participation goal, information about opportunities, or a subcontracting requirement. A ban may remove more than one route at once.

The study's exposure measure is narrower than that institutional history. It observes a firm's state-government customer relationship through survey responses and uses the timing of the state ban. It does not observe the value, margin, duration, payment schedule, or exact preference attached to each contract. Consequently, the estimated response is evidence about a change in the procurement opportunity structure, not a transaction-level estimate of lost cash flow.

Published by DeepMox

FAQ

How large was the MWBE employment decline five years after the bans?

It was approximately 10.9% relative to non-MWBE contractors in the Census study's pre-ban and control-state comparison. This is a relative employment estimate, not an absolute count of jobs lost.

Did the procurement bans cause an immediate collapse in MWBE employment?

No. The Census event study shows a gradual relative decline after the bans, consistent with contract turnover and adjustment over time rather than an instantaneous collapse.

What do the Census data fail to show about procurement preference bans?

They do not show each contract's value, margin, duration, payment schedule, or exact preference, nor whether a bank would lend against missing public revenue. The exposure measure uses state-government customer share and ban timing.

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State Government Procurement Preference Bans and MWBEs

What Disappears When Preferences Disappear?

A contracting opportunity can be removed without closing a firm

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