State Economic Development Incentives

What the evidence says

Direct fiscal incentives for industrial decarbonization carry the clearest dose-response evidence on this page. Capital subsidies of 30–50% decrease the levelized cost of hydrogen (LCOH), and modeling that varies CAPEX incentive levels from 0% to 70% traces a continuous relationship: LCOH decreases from about 8 USD/kg to roughly 3 USD/kg, and emissions intensity decreases from about 3.2 to 1.4 kgCO₂eq/kg over the same range (Marouani 2026). Incentives alone, without equipment cost declines, account for cost reductions of 43–54%; combined with falling equipment costs, they bring hydrogen production costs to levels competitive with natural gas. Electricity tariff exemptions decrease operational expenses specifically because electricity can account for up to 70% of LCOH — a stated mechanism, not just a correlation.

On firm formation and growth, Coase (1937) draws a distinction not measured elsewhere on this page: policy tools that tax or ration market transactions while exempting production organized inside a firm — sales taxes, quota schemes, price controls — increase the size and growth of firms that already exist, because they make organizing production inside a firm cheaper relative to transacting through the market. Coase separates this from firm creation: such measures are described as unlikely to have brought firms into existence in the first place, a no-measured-effect finding on entry that sits alongside the positive effect on the growth of incumbents.

On local labor markets, Bartik (1991) ties local job growth to decreased unemployment, increased labor force participation, and increased real estate values, without quantified magnitudes. Bartik also reports a distributional finding: earnings gains to disadvantaged groups from job growth exceed the increased real estate values captured by property owners.

On institutions, R&D, and innovation in lower-middle-income countries, Fayyaz (2025) finds institutional development increases R&D activity (a one standardized-unit increase in an institutions indicator increases R&D by 1.074 units), and that R&D itself increases innovation (+0.34 per standardized unit, p=0.001), as do capital market institutions (+0.12, p=0.007). But the same study finds no measured effect of innovation on economic growth, and no significant relationship between "LI" and innovation (p=0.19) or between innovation and growth (p=0.233) in that sample. The causal chain from institutional and financial incentives through R&D and innovation is measured up to innovation, but does not reach growth in this evidence.

The remaining sources describe conservation-tourism incentives (Wunder 2000) as increasing local income, and Chinese local-government incentive restructuring (Evans 1996) as increasing self-organization and entrepreneurship — but the tourism finding is explicitly conditional: it produces a conservation effect "only if tourism changes labour and land allocation decisions." This page's evidence is thin on the classic questions of subnational state economic development incentives specifically: no claim here quantifies job-creation cost per dollar of tax abatement, firm relocation across competing jurisdictions, or net fiscal cost of an incentive program.

Where the evidence splits

No contradictions in the current sources.

Thresholds and dose-response

Capital subsidies of 30–50% decrease the levelized cost of hydrogen production. Where CAPEX incentive levels range from 0% to 70%, LCOH decreases from about 8 USD/kg to roughly 3 USD/kg, and emissions intensity decreases from about 3.2 kgCO₂eq/kg to about 1.4 kgCO₂eq/kg over the same range. Incentives alone (without equipment cost declines) produce cost reductions of 43–54%. Electricity costs can account for up to 70% of LCOH, which is the stated reason electricity tariff exemptions decrease operational expenses. All of these thresholds come from Marouani (2026); no other source on this page establishes a graded threshold or cutoff.

Open empirical questions

• No claim here quantifies fiscal cost per job created, per firm attracted, or per unit of output for any incentive design.
• No claim here measures firm relocation or site-selection response to differences between competing jurisdictions' incentive packages.
• Whether the innovation-to-growth disconnect found in lower-middle-income countries also holds in higher-income economies is not addressed.
• Whether the firm-size and firm-growth effects of tax/quota exemptions (Coase 1937) hold at the magnitudes seen in modern state-level incentive programs is not measured.