Globally, about 24% of adults lack access to a basic account that can safely store and transfer money. The majority of these adults live in low and middle income countries; many are poor and many are women. Financial exclusion is especially widespread in sub-Saharan Africa, where nearly half of all adults do not have a bank account (Demirguc-Kunt et al., 2018). Advances in digital financial technology, especially through the proliferation of mobile money, offer a new way to extend financial services to populations who do not have access to the formal financial sector. Mobile money technology provides users with a convenient way to send and receive payments, such as domestic remittances, as well as a mechanism to safely and privately store money. Mobile money is accessible for anyone with a mobile phone and SMS network connectivity (smartphone and internet access are not required). Existing research reveals promising improvements in financial inclusion outcomes and welfare benefits (Jack & Suri, 2014; Nanda & Kaur, 2016; Bahia et al., 2020), but mobile money innovations currently outpace the academic literature. In Chapter 1, I examine one such innovation: a 2014 Bank of Tanzania policy mandating the distribution of interest to mobile wallet account balances. I exploit the differences in interest allocation methods of different mobile money providers in Tanzania to conduct a difference-in-differences analysis of the effect of a specific savings incentive on mobile savings behavior. I find a consistent and positive effect of the savings incentive; customers under this policy had an 11 percentage point increase in the probability of saving with their mobile wallet. I also show that the mobile savings incentive produced no negative repercussions for bank account ownership, directly addressing concerns from the banking sector that mobile interest is a threat to the formal financial sector. Such findings may be highly relevant to the current policy debates around leveraging mobile money interest provision to increase financial inclusion among the world’s poorest. In Chapter 2, I investigate another mobile money innovation: digital loan repayment for microfinance customers. Existing research is largely focused on the implications of digitization for loan repayment rates and operational efficiency, but this paper uniquely centers the overlooked perspectives of microfinance borrowers. I leverage a mixed-methods approach, including a quantitative discrete choice analysis and a qualitative content analysis of stated preferences, to explore the determinants of demand for a digital repayment option among a group of current microfinance clients in Uganda. I find that borrowers’ comfortability with mobile money, education level, and perceptions of the cost and convenience of digital repayment are important determinants of demand. However, qualitative data reveal heterogeneity in borrowers’ understanding of how digital repayment will impact the microfinance group structure and their future access to credit, which has substantial implications for the uptake of digital repayment. These findings can inform the design of digital microfinance innovations and also contribute to the broader literature around technology adoption by highlighting the importance of qualitative data and user-centered research. In Chapter 3, I focus on the diffusion of mobile money policies. Specifically, I examine the policy convergence around risk-based Know-Your-Customer (KYC) regulation over time in sub-Saharan Africa. Risk-based KYC policies lower barriers to both mobile money provision and access. I ask the research question: What are the internal determinants and external influences associated with the regulator’s decision to adopt internationally recommended KYC policies for mobile money? Using an event history approach, I investigate the relative importance of domestic banking concentration, foreign aid dependence, and participation in the international financial inclusion community on the time-to-implementation of risk-based KYC policies. While domestic pressures from highly concentrated banking sectors may marginally deter risk-based KYC adoption, I find the primary accelerator of risk-based KYC policy adoption to be regional diffusion. Insight into the mechanisms underlying mobile money policy convergence lays the groundwork for future research to facilitate the regulatory components of financial inclusion promotion.