24 Aug 2026

Modern corporations as insulators against climate shocks, Big Ideas Ep 79

Viral Acharya argues that large corporations with multiple locations can diversify climate shocks the way cross-district marriages once diversified rainfall risk in village India

VIDEO BY

Viral V. Acharya

Viral V. Acharya is the C.V. Starr Professor of Economics in the Department of Finance at New York University Stern School of Business (NYU-Stern). He is a Research Associate of the National Bureau of Economic Research (NBER) in Corporate Finance and International Finance and Macroeconomics, a Research Affiliate at the Center for Economic Policy Research (CEPR), and Research Associate of the European Corporate Governance Institute (ECGI). Viral was a Resident Scholar at the Federal Reserve Bank of New York (Sep 2022-Jan 2023) and a Deputy Governor at the Reserve Bank of India (RBI) during 23rd January 2017 to 23rd July 2019 in charge of Monetary Policy, Financial Markets, Financial Stability, and Research.

Abstract

Climate change research has mostly focused on how firms and workers adapt in place: better air conditioning, safer roofs, stronger worker protections. Viral Acharya offers a different lens. He argues that the modern corporation, simply by having multiple establishments spread across different locations, acts as a built-in mechanism for diversifying climate risk, much like an old risk-sharing practice from village India.

Acharya traces the idea back to economist Robert Townsend's work on village India, where families married their children across districts with different rainfall patterns specifically to share risk. He argues that the modern corporation institutionalizes this same logic at scale. Using the example of a firm with plants in hot Arizona and cooler Seattle, he walks through how a company can shift production toward climate-friendly locations when heat shocks hit, effectively insulating the aggregate economy even as individual regions suffer. This leads him to a methodological point: studies that measure climate damage by looking only at the directly affected location may miss how firms reallocate production elsewhere, meaning the true aggregate impact could look different from the local one. He also flags a spatial consequence, some regions become climate change "winners" as production shifts toward them, while others see falling wages and shrinking local economies.

The talk closes with implications for India, where Acharya worries that a fragmented, small-firm agricultural sector lacks the scale to diversify climate shocks the way large modern corporations can, and where the resulting damage could carry a distinctly stagflationary character. The chapters below trace this argument from its historical roots to its practical stakes for an economy like India's.

Citation

Acharya, Viral V.. "Modern corporations as insulators against climate shocks." Episode 79 of Big Ideas. XKDR Forum, 24th August 2026. Video, 14:10. https://www.xkdr.org/viewpoints/modern-corporations-as-insulators-against-climate-shocks-big-ideas-ep-79

Key Insights

Analogy: In village India, families married children across districts with different rainfall patterns specifically to share climate risk, an early form of diversification against local shocks.
The modern corporation, through its network of establishments in different locations, functions as an institutionalized version of this same risk-sharing logic, reallocating production and profit across locations to insulate the overall firm from a shock in any one place.
When a firm shifts production away from a climate-affected location (like a heat-hit Arizona plant) toward another location (like Seattle), the aggregate labor productivity and output impact of the climate shock may be smaller than what is measured by studying the affected location in isolation.
Most empirical studies of climate change isolate a single event, a wildfire, a heat wave, in one location and measure its local impact on labor productivity or output. This approach may not capture the true aggregate effect once firms with multi-location production networks reoptimize around the shock.
A climate shock is not purely negative at the aggregate level: a negative heat shock to a location like Arizona can simultaneously be a positive shock to an alternative location like Seattle, if firms shift production there.
This reallocation produces spatial redistribution rather than uniform damage: the directly hit region can see rising unemployment, falling wages, and a shrinking local economy, while the alternative region gains production and benefits.
This offers a structural explanation for why certain regions (Michigan, Chicago, Seattle in the US; Stockholm in Sweden) are often described as climate change "beneficiaries": they are positioned to absorb production shifted away from more severely affected regions.
Climate shocks to agriculture can be stagflationary: they reduce crop yields and output (a growth shock) while simultaneously creating a supply-side shock to inflation, since urban consumption demand does not fall at the same rate as the drop in agricultural supply.
Fragmented, small-scale agricultural sectors, as in India, lack the scale and structure of the modern corporation, and may therefore be less able to diversify climate shocks the way large multi-location firms can.

Notes

From village marriages to modern corporations

Acharya opens with a historical example from village India, drawing on the work of economist Robert Townsend. In the old village economy, rainfall was variable across districts, and this variability created a climate shock that households needed to manage. The mechanism that emerged was social rather than financial: marrying children across districts.

He explains the logic simply:

"If your bride was with a groom in a neighboring district, but with a different rainfall pattern, the families would get a risk sharing benefit from that."

Acharya's central claim is that this old idea, diversification as a defense against climate shocks, still holds today, but in a very different institutional form. Where modern discussions of adaptation and mitigation tend to focus on firms doing something to reduce damages in place (better air conditioning for workers, safety mechanisms, sturdier infrastructure), Acharya points to a different mechanism entirely: the modern corporation itself, through its multiple establishments and locations, can play the same diversifying role that cross-district marriage once played.

He describes the modern corporation as an institution that formalizes this diversification:

"The beauty of the modern corporation is that it institutionalizes the arrangement that the marriage across districts was trying to achieve, by actually setting up multiple locations and then optimizing into where the production is going to happen, how the risk sharing can be done with profit transfers or investment transfers across locations, and therefore the economy gets insulated as a whole."

This research is joint work with Abhishek Bharadwaj (Indian School of Business) and Thomas Tomunen (Boston College).

The Arizona-Seattle example: how firms reallocate production

To make the mechanism concrete, Acharya builds out a detailed example. Arizona is a very hot US state, routinely seeing temperatures above 110°F (roughly 40°C or higher), and last summer saw a stretch of ten to eleven days above 115°F. Imagine a firm, he suggests, that has a plant in Arizona and another in Seattle, Washington, doing seventy percent of its production in Arizona and thirty percent in Seattle.

After repeated summers of excess heat, and perhaps multiple such summers in a row, the firm's leadership (the COO, CFO, and CEO) starts to conclude that this pattern may reflect real climate change, and that concentrating production so heavily in Arizona carries growing risk. The natural response, Acharya argues, is not just to fortify the Arizona plant, but to expand capacity at the Seattle plant and ship more product from there. He uses Amazon warehouses as an illustrative case: a firm might expand its Seattle warehouse and route more shipments from it, even though this could raise shipping costs for orders that would otherwise have been served more cheaply from Arizona. He notes that e-commerce already routinely serves customers from locations far from delivery points, so these costs can be optimized rather than being prohibitive.

The stakes of not reallocating are significant. Excess heat lowers worker productivity, raises the risk of worker injuries and fatalities, and can even threaten physical infrastructure such as warehouse roofs. Firms that stay concentrated in hot locations face rising costs: insurance for workers, rebuilding costs, and the need for different roof designs suited to a warming climate. Acharya's point is that fortifying the hot location in place is only one possible response, and it is the one that gets the most attention. The other response, shifting the entire production network toward friendlier locations, is often overlooked.

Why local climate studies miss the aggregate picture

This reallocation mechanism has a direct implication for how climate change research measures damage. Acharya argues that the modern corporation acts as a kind of climate change insulator for the economy, in this example, a heat insulator, since it manages shocks by diversifying them away from the hit location toward a more favorable one.

A consequence follows: aggregate labor productivity need not decline as much as a location-specific study would suggest.

"Most studies of climate change would isolate a climate event like a wildfire or a hot day, a really hot day occurring in some location, and study locally, from an empirical standpoint, what is the impact on labor productivity in that region... [But this] kind of ignores the fact that the entire production network of the firms is going to actually move over time to locations which are friendlier in terms of climate change developments."

Because of this, Acharya argues that narrow estimates of climate impact on labor productivity, growth, or other aggregate outcomes, drawn from studying individually affected locations, might not fully reflect what happens to the aggregate economy once large modern corporations reoptimize and recalibrate their production networks to diversify these shocks away.

Winners and losers: spatial redistribution of climate effects

Even though the aggregate economy may be insulated to some degree, Acharya is clear that this does not mean the impact of climate change disappears. Instead, it gets redistributed spatially. In the Arizona example, as production shifts away, Arizona itself would likely see rising unemployment, gradually collapsing wages (since labor supply would outstrip labor demand), and a shrinking local economy.

But this loss for one region is a gain for another:

"A negative shock to one destination is actually a positive shock to another destination... a negative shock to Arizona is at the same time a positive shock to Seattle."

Acharya connects this directly to a familiar but often unexplained observation: that certain regions are commonly described as climate change "beneficiaries." In the US, he points to Michigan, Chicago, and Seattle; in Europe, Sweden and Stockholm. He argues there is a deeper mechanism behind this labeling than is usually appreciated: these regions are not just naturally cooler, they are positioned to absorb the production and economic activity that shifts away from more severely affected regions, as firms reallocate their networks in response to climate shocks. Every heat shock in Arizona, in this framing, is simultaneously a positive shock to a firm's operations in Chicago, Detroit, Seattle, or Stockholm.

Implications for India: fragmentation and stagflationary risk

Acharya then turns to what this framework means for an emerging market like India. His first point is that the modern corporation, given its role as a climate insulator, is a very important entity to develop, finance well, and grow in large numbers.

He raises a specific concern about Indian agriculture, which is highly fragmented. Land aggregation is difficult in India because of complications with land rights, records, and state-level restrictions. This means Indian agriculture is dominated by small firms and individual household-run farms rather than large, multi-location agricultural corporations.

"This is going to become a big problem... The village Indian economy can insulate some of these shocks by doing marriages across districts, but clearly that is not a very powerful mechanism to diversify these shocks as could be possible if shocks in hot regions like Madhya Pradesh could actually be shared with regions like Mohali in Punjab."

Acharya argues that India needs to find ways to aggregate smaller agricultural firms into larger modern agricultural corporations that could optimize production across locations and act as heat insulators for the economy. Until that aggregation happens, he suggests the impact of heat shocks on labor productivity could pose a bigger national risk to the Indian economy than it otherwise might.

He closes by highlighting a specific feature of climate shocks in this agricultural context: they tend to be stagflationary. On one hand, they reduce crop yields and agricultural output, a growth shock. On the other hand, this reduction in supply creates upward pressure on inflation, since urban demand for goods does not decline at the same rate as the drop in agricultural output. Acharya suggests that developing the modern corporation is one way to better diversify climate change risk in an economy, but doing so requires thinking carefully about the factors of production these corporations optimize around, land, power, water supply, and, in the case of an emerging market's agricultural sector, the stagflationary risks that climate change can introduce into the broader economy.