In this essay, I study topics at the intersection of macro-development and production networks, focusing on the macroeconomic effects of lock-in and productive innovations, the role of investment linkages in long-run economic development, and the drivers of business cycle volatility differences between emerging and developed economies. In the first chapter, "Lock-In and Productive Innovations: Implications for Firm-to-Firm Innovation Pass-Through," I study the macroeconomic implications of innovations that make products harder to substitute, creating a lock-in effect on customers, and quantify their consequences for aggregate productivity and market power. In the second chapter, "On the Investment Network and Development," with Julieta Caunedo, we construct the first harmonized measures of the investment network for 58 countries at different stages of development. We study how cross-country differences in the usage and production of investment goods across sectors help explain income disparities. In the third chapter, "The Business Cycle Volatility Puzzle: Emerging vs. Developed Economies," with Rafael Guntin, we study the drivers of business cycle volatility differences between emerging and developed economies. We develop and quantify a multisector small open economy framework with heterogeneous firms and production linkages, in which firms are subject to sectoral and firm-level TFP shocks and international prices shocks.