- In a 2025 article published in the Journal of Development Economics, researchers Alexander D. Rothenberg, Yao Wang, and Amalavoyal Chari examined the effectiveness of Indonesia’s Integrated Economic Development Zone (KAPET) program.
- Introduced in the late 1990s, KAPET was designed as a major place-based policy intervention aimed at accelerating economic growth in the Outer Islands by offering substantial capital tax incentives to firms operating within designated districts. The study assessed whether these incentives succeeded in attracting investment, encouraging industrial expansion, and reducing regional disparities.
- The findings reveal that the program failed to achieve its intended objectives. Despite generous fiscal incentives, KAPET did not significantly increase firm entry, industrial output, or broader economic development in targeted districts. Development outcomes in KAPET areas were largely indistinguishable from those in non-treated regions.
- Using a quantitative spatial model, the researchers argue that tax incentives alone are rarely sufficient to stimulate growth in lagging regions. Instead, sustainable regional development requires complementary investments in infrastructure, public services, and local amenities that improve the overall attractiveness and productivity of a location.
MARITIMEPOSTS.COM – Governments around the world share a common reflex when a region falls behind: they reach for the checkbook. From the special economic zones of the Pearl River Delta to the enterprise zones of the American Rust Belt, the logic of the “Big Push” remains seductive.
By providing massive tax incentives, policymakers hope to lower the cost of doing business enough to trigger a virtuous cycle of industrialization, job creation, and “endogenous productivity” gains.
However, a landmark study of Indonesia’s Integrated Economic Development Zone (KAPET) program, recently published in the Journal of Development Economics, suggests this reflex is often a trillion-rupiah mistake.
Launched in the late 1990s, KAPET was a massive natural experiment designed to jumpstart growth in Indonesia’s “Outer Islands”—remote reaches of Kalimantan, Sulawesi, and Papua that have historically lived in the shadow of Java’s economic dominance.
The results are a sobering lesson for the global policy elite: while the program successfully slashed taxes for firms, it failed to move the needle on migration, employment, or industrial output.
The program’s struggle reveals that fiscal policy is often powerless against the “hidden” fundamentals of economic geography.
The First-Stage Paradox: When Tax Cuts Work but Growth Doesn’t
The failure of the KAPET program was not a failure of administration or a lack of “teeth.” On paper, the “first stage” of the policy worked exactly as intended.
Research into firm-level panel data shows that companies operating within KAPET districts paid significantly lower taxes on sales, business licenses, building permits, and land—roughly 54% of what they would have paid elsewhere.
Despite this substantial fiscal success, the impact on regional development was virtually non-existent. There were no significant increases in firm entry, total output, or value added.
As the researchers note: “Our quantitative null results validate other analyses of the KAPET policy… the program’s incentives neither stimulated entry nor increased output.”
This creates a paradox that challenges the bedrock of traditional development theory.
It suggests that high capital costs—often cited as the primary barrier to industrialization in the developing world—are frequently a secondary concern. If cutting the tax burden by nearly half doesn’t encourage a firm to move or expand, the bottleneck is not the checkbook; it is the roadmap.
The Geography Trap: Why You Can’t Subsidize Your Way Around Bad Soil
Why didn’t firms bite? The answer lies in the “Geography Trap.” The structural model used to analyze the program identifies “poor local fundamentals” as a barrier no tax break could reasonably overcome.
The researchers found that the inverted local fundamentals of KAPET zones—their intrinsic productivity and amenities—were often significantly lower than their neighbors.
The model correlates these “input wedges” with literal, physical inhibitors. For instance, many KAPET districts suffer from severe soil quality issues: high bulk density, excess salinity, and toxicity (prevalence of calcium carbonate and gypsum).
In economic terms, this leads to “spatial misallocation.” Moving economic activity to a remote location with poor soil and high “trade frictions” might satisfy a political equity goal, but it is often welfare-reducing for the nation.
If a firm is bribed to operate in a place with poor market access and unfavorable natural amenities, the resulting inefficiencies simply swallow the fiscal subsidy.
The Synergy Requirement: Tax Cuts Need “Friends”
One of the most critical findings of the research is that tax incentives do not operate in a vacuum. They possess a “synergy requirement.”
When the researchers simulated a counterfactual scenario pairing tax cuts with infrastructure and amenity improvements, the results shifted dramatically.
The model reveals that the national welfare gains of the KAPET program would have been 3.8 times higher (nearly 4x) if the tax cuts had been part of a broader package that addressed local fundamentals.
To succeed, tax cuts need “friends” such as:
- Connective Infrastructure: Road maintenance and port improvements to reduce the “iceberg trade costs” that make remote islands uncompetitive.
- Local Amenities: Enhancements in “endogenous fundamentals” like electricity coverage and the density of health and education facilities to attract skilled workers.
- Reduced Migration Costs: Policies that lower the friction for workers to move toward new opportunities.
Without these complementary policies, tax breaks are like trying to start a fire with plenty of matches but no kindling.
The Red Tape Reality: Entry Barriers Over Capital Costs
The KAPET program focused almost exclusively on lowering the cost of capital. However, the simulation suggests the Indonesian government was pulling the wrong lever.
The model found that reducing “formal fixed entry costs”—the red tape, licensing hurdles, and competition barriers—was 22 times more impactful on national welfare (a 0.222% gain) than the baseline capital tax cut (0.010%).
High entry costs act as a “gatekeeper” that prevents productive firms from even considering a region. Reducing these administrative burdens is not only more effective at stimulating growth but also more fiscally sustainable.
Unlike tax breaks, which erode the nation’s revenue base and limit the ability to fund public goods, cutting red tape improves the business environment without draining the treasury.
The Efficiency Paradox: The Tough Logic of Agglomeration
Perhaps the toughest “pill to swallow” for policymakers is the finding regarding national efficiency.
The model suggests that if the goal is to maximize total national growth, the government would have been more welfare-enhancing by providing tax cuts to Greater Jakarta—the already successful, dense hub—rather than the KAPET zones.
This highlights the “Efficiency Paradox.” Because Jakarta already possesses high population density and established “agglomeration economies,” every rupiah of tax incentive spent there generates a significantly higher return.
In contrast, in high-informality areas like the KAPET districts, tax cuts often fail to induce “sector switching.” Instead, they simply “reshuffle” existing activity from one informal pocket to a subsidized formal one, without creating new net growth.
While focusing on the Outer Islands is a noble goal for regional inclusivity, doing so through tax breaks alone often fights against the “congestion forces” and population density that actually drive modern economies.
Roadmap vs. Checkbook
The core lesson of Indonesia’s trillion-rupiah experiment is clear: the KAPET program didn’t fail because the tax cuts were too small, but because it tried to fight the realities of economic geography with a checkbook instead of a roadmap.
For place-based policies to work, they must address the structural barriers—soil toxicity, port access, and regulatory red tape—that make a region “lagging” in the first place.
As governments worldwide continue to pour billions into regional incentives, they must confront a difficult question: In our rush to help “lagging” regions catch up, are we ignoring the structural barriers that make them fall behind in the first place?
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Editorial Team
