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‘The market failures in the provision of food should not be a partisan matter’: Columbia Business School experts on the NYC-owned grocery store experiment

Mayor Zohran Mamdani says municipal grocery stores will lower the price of essential foods. CBS experts explain what the plan could fix and how the city should measure success.

Published
July 30, 2026
Publication
Columbia Business
Focus On
Economy & Policy
Jump to main content
Article Author(s)
Jonathan Sperling

Jonathan Sperling

Associate Director, Editorial
Marketing and Communications
NYC-owned grocery stores
Category
Thought Leadership
Topic(s)
Economics and Policy

About the Researcher(s)

Photo Image of Joseph Stiglitz

Joseph Stiglitz

Professor
Economics Division
Professor
Heilbrunn Center for Graham and Dodd Investing
Executive Director and Co-founder
Initiative for Policy Dialogue
Lori Yue

Lori Yue

Charles E. Exley Professor of Business
Management Division

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City-owned grocery stores are coming to NYC’s “Commie Corridor” – and beyond.

On July 27, Mayor Zohran Mamdani announced that five government-owned supermarkets, one in each borough, will sell key food items at prices 30 percent below typical retail. 

The discount will cover all fresh produce, meat, and seafood, plus roughly 20 categories of pantry staples, dairy, and refrigerated goods, including milk, bread, and eggs. Every shopper will qualify, regardless of income, and the city will lock in prices for a month at a time.

Supporters believe the stores could help solve food insecurity during a period of rising food costs. 

“Every week, New Yorkers walk into a grocery store hoping the prices haven’t gone up again,” Mamdani said at a recent press conference. Food prices had gone up 33% since 2019, he noted — significantly outpacing wages and inflation. 

The hybrid model, according to Mamdani, could offset operating costs, since government-owned stores would not need to pay rent and property tax. Private operators will still handle sourcing, staffing, merchandising, inventory, and customer service. 

Some economists and small business owners have criticized the plan, saying that the stores could drive out private competition and reduce variety. Frank Garcia, chairman of the Multicultural Business Coalition, told The New York Times that the stores could “put our businesses out of business.”

Whether the plan succeeds will depend on both its economic rationale and its execution, according to Columbia Business School professors Joseph Stiglitz and Lori Yue.

‘Market failures in the provision of food’

Competitive markets are often assumed to be the most efficient way to provide ordinary goods, says Stiglitz, a Nobel laureate in economics. He argues that grocery stores demonstrate the limits of that thinking.

“Even seemingly competitive markets like grocery stores are better described by monopolistic competition than perfect competition,” Stiglitz says.

Unlike a textbook market in which sellers offer interchangeable goods, grocery stores distinguish themselves through location, selection, branding, and convenience. Those differences give individual stores some control over pricing, even in an industry with thin profit margins. 

The pressure to preserve those margins can create a gap between what is profitable for stores and what is beneficial for shoppers. Grocers may have stronger incentives to promote processed, high-margin products than healthier foods that produce less revenue, for example. Candy-filled checkout aisles and neighborhoods where residents struggle to find nutritious staples illustrate how the market can fall short of addressing broader social needs.

Price volatility creates another problem, as sudden increases in the cost of food fall especially heavily on lower-income households, which have less room in their budgets to absorb them. 

A better functioning economic system would shift that risk to institutions better-equipped to absorb it, Stiglitz argues. “The provision of an alternative public option can increase societal welfare,” he says, even when that option operates less efficiently than private businesses or requires continuing public support.

Stiglitz points to cooperative grocery systems in other countries, like Singapore, as potential models. While different in some ways, they demonstrate that governments can work closely with alternative retail structures to pursue goals beyond maximizing profit.

‘Public enterprises can struggle with efficiency, innovation, and responsiveness’

In food deserts or neighborhoods where grocery prices remain persistently high, the government may have a legitimate role in filling gaps the private market leaves, according to Yue. But a public mission does not eliminate a supermarket’s operational challenges.

“Governments are not typically specialized in retail operations,” says Yue, the Charles E. Exley Professor of Business. “Public enterprises can struggle with efficiency, innovation, and responsiveness to customers.”

That is why Yue considers the decision to recruit experienced private operators encouraging. Those partners could bring the procurement systems, management experience, and customer knowledge that municipal agencies often lack.

The city will need contracts and oversight mechanisms to ensure that the promised discounts do not compromise product quality, availability, or long-term viability, she argues.

The plan could also affect existing businesses: Small shops and bodegas will have to compete with stores that receive city-provided sites and pay no rent or property taxes. For its part, the Mamdani administration says its stores will not sell alcohol, cigarettes, lottery tickets, or hot food.

Yue cautions against assuming the binary view that government-owned stores will either transform the grocery market or destroy it. Five locations represent a relatively small intervention in a vast retail economy. 

That makes the program a solid policy experiment that can reveal whether the model improves affordability and access without significantly harming nearby businesses. Ultimately, Yue argues, the city should judge the stores by empirical evidence: Do they improve food access, maintain affordable prices, operate efficiently, and benefit the communities the program aims to serve?

About the Researcher(s)

Photo Image of Joseph Stiglitz

Joseph Stiglitz

Professor
Economics Division
Professor
Heilbrunn Center for Graham and Dodd Investing
Executive Director and Co-founder
Initiative for Policy Dialogue
Lori Yue

Lori Yue

Charles E. Exley Professor of Business
Management Division

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