This section addresses the crucial “so what?” question by articulating the expected contributions of the research to both academic economic theory and the practical understanding of real-world economic policy. The project is designed to generate insights that are both theoretically novel and practically relevant.

5.1 Contribution to Economic Theory

This research is poised to make two significant contributions to economic theory. First, it will refine the theory of endogenous growth by providing a more complete and realistic model of the determinants of innovation bias. By moving beyond a two-factor world (skilled vs. unskilled labor) to analyze the critical, and currently under-explored, interactions involving capital accumulation, the project will offer a richer understanding of how the economy’s overall factor endowments shape technological evolution.

Second, the research will provide a formal test of the hypothesis, articulated in Chapter 15.6, that Harrod-neutral (purely labor-augmenting) technological change is an endogenous and stable outcome of the growth process. By assessing the robustness of this claim in a richer three-factor environment, the project will help solidify the micro-foundations for one of the most important, and least-explained, assumptions underlying modern growth theory.

5.2 Implications for Policy Analysis

The findings of this research will have direct and important implications for public policy, particularly in the areas of investment, education, and inequality.

• Investment Policy: The research will provide a formal framework to analyze how policies affecting capital accumulation, such as investment tax credits or changes in capital gains taxation, can have significant and potentially unintended consequences on wage inequality. By endogenizing the direction of technology, the model shows that such policies do not just affect the quantity of capital but also the type of technologies firms develop, with direct effects on the relative demand for skilled and unskilled workers.
• Education Policy: The findings will inform the debate over the long-term impacts of education policy. The model will clarify the specific conditions (related to factor substitutability) under which policies that successfully increase the supply of skilled workers will translate into higher, or potentially lower, long-run wage inequality.
• Understanding Inequality: Ultimately, the project will offer a more nuanced and dynamic understanding of income inequality. It will show that inequality is not merely a static outcome of given technologies and factor supplies, but is instead shaped by the dynamic, endogenous evolution of technology in direct response to the changing factor endowments of the economy.

By integrating capital accumulation into the theory of directed technological change, this research will provide a more comprehensive lens through which to view the interconnectedness of growth, innovation, and income distribution.