In this article I explain a nexus between slavery and state formation in Africa, proceeding from initial demographic and institutional conditions to an external demand shift, individual state responses, and their collective systemic consequences. Historically, African rulers faced distinctive challenges: low population density prioritized control of people more than territory, and internal disintegration was often a greater threat than external conquest. A massive expansion in the demand for slaves offered African rulers increased opportunities to use external resources for “outside-in” state building. Many did so by creating highly militarized predatory slaving states. The collective consequence was heightened systemic insecurity. Variation in the timing of these developments reflected regional and historical variation in the expansion of the demand for slaves. Slaving states appeared first in West Africa, reflecting the late-seventeenth-century expansion of the trans-Atlantic slave trade, before spreading to East Africa a century later, following the parallel later increase in the Indian Ocean slave trade. This “outside-in” path to state formation both parallels and contrasts with contemporary postcolonial state formation.

Most autocracies restrict emigration yet still allow some citizens to exit. How do these regimes decide who can leave? We argue that many autocracies strategically target anti-regime actors for emigration, thereby crafting a more loyal population without the drawbacks of persistent co-optation or repression. However, this generates problematic incentives for citizens to join opposition activity to secure exit. In response, autocracies simultaneously punish dissidents for attempting to emigrate, screening out all but the most determined opponents. To test our theory, we examine an original data set coded from over 20,000 pages of declassified emigration applications from East Germany's state archives. In the first individual-level test of an autocracy's emigration decisions, we find that active opposition promoted emigration approval but also punishment for applying. Pensioners were also more likely to secure exit, and professionals were less likely. Our results shed light on global migration's political sources and an overlooked strategy of autocratic resilience.

Why do states create weak international institutions? Frustrated with proliferating but disappointing international environmental institutions, scholars increasingly bemoan agreements which, rather than solving problems, appear to exist “for show.” This article offers an explanation of this phenomenon. I theorize a dynamic of deflective cooperation to explain the creation of compromise face-saving institutions. I argue that when international social pressure to create an institution clashes with enduring disagreements among states about the merits of creating it, states may adopt cooperative arrangements that are ill-designed to produce their purported practical effects. Rather than negotiation failures or empty gestures, I contend that face-saving institutions represent interstate efforts to manage intractable disagreement through suboptimal institutionalized cooperation. I formulate this argument inductively through a new multi-archival study of conventional weapons regulation during the Cold War, which resulted in the oft-maligned 1980 UN Convention on Certain Conventional Weapons. A careful reconsideration of the negotiation process extends and nuances existing IR theorizing and retrieves its historical significance as a critical juncture and complex product of contesting diplomatic practices.

Almost all technology is dual use to some degree: it has both civilian and military applications. This feature creates a dilemma for cooperation. States can design arms control institutions to curtail costly competition over some military technology. But they also do not want to limit valuable civilian uses. How does the dual use nature of technology shape the prospects for cooperation? We argue that the duality of technology presents a challenge not by its very existence but rather through the ways it alters information constraints on the design of arms control institutions. We characterize variation in technology along two dual use dimensions: (1) the ease of distinguishing military from civilian uses; and (2) the degree of integration within military enterprises and the civilian economy. Distinguishability drives the level of monitoring needed to detect violations. When a weapon is indistinguishable from its civilian counterpart, states must improve detection though intelligence collection or intrusive inspections. Integration sharpens the costs of disclosing information to another state. For highly integrated technology, demonstrating compliance could expose information about other capabilities, increasing the security risks from espionage. Together, these dimensions generate expectations about the specific information problems states face as they try to devise agreements over various technologies. We introduce a new qualitative data set to assess both variables and their impact on cooperation across all modern armament technologies. The findings lend strong support for the theory. Efforts to control emerging technologies should consider how variation in the dual use attributes shapes this tension between detection and disclosure.

How do emerging technologies affect nuclear stability? In this paper, we use a quasi-experimental cyber-nuclear wargame with 580 players to explore three hypotheses about emerging technologies and nuclear stability: (1) technological uncertainty leads to preemption and escalation; (2) technological uncertainty leads to restraint; and (3) technological certainty leads to escalation through aggressive counterforce campaigns. The wargames suggest that uncertainty and fear about cyber vulnerabilities create no immediate incentives for preemptive nuclear use. The greater danger to strategic stability lies in how overconfidence in cyber exploits incentivizes more aggressive counterforce campaigns and, secondarily, how vulnerabilities encourage predelegation or automation. Both of these effects suggest worrisome relationships between cyber exploits and inadvertent nuclear use on one hand and cyber vulnerabilities and accidental nuclear use on the other hand. Together, these findings reveal the complicated relationship between pathways to escalation and strategic stability, highlighting the role that confidence and perhaps-misplaced certainty—versus uncertainty and fear—play in strategic stability.

I argue that exchange rates are an underappreciated explanation for the significant variation in the extent of female labor force participation in developing countries. Occupational segregation in developing countries is such that women working outside of the home tend to be segregated in labor-intensive export-oriented industries. Consequently, when an overvalued exchange rate increases export prices, it reduces commensurately the demand for female labor. This causes some women to drop out of the labor force. Data from over 150 low- and middle-income countries between 1990 and 2015 support this argument.