Free trade and forms of democratization

How do democratic transitions affect trade policy? A well-known finding is that transitions in developing countries produce lower tariff rates. But prior work implicitly assumes that all forms of democratic transitions are alike. There is less reason to expect trade liberalization to follow transitions led by political elites, which constitute roughly half of all democratic transitions in recent decades. Analysis of industry-level tariff rates indicates that elite-led transitions are not consistently followed by trade liberalization, while transitions initiated by the general public are associated with tariff rate reductions

Group ties amid industrial change

Coethnics often work in the same industries. How does this ethnic clustering affect individuals' political loyalties amid industrial growth and decline? Focusing on migrant groups, the author contends that ethnic groups' distribution across industries alters the political allegiances of their members. When a group is concentrated in a growing industry, economic optimism and resources flow between coethnics, bolstering migrants' confidence in their economic security and dissuading investments in local political incorporation. When a group is concentrated in a declining industry, these gains dissipate, leading migrants to integrate into out-groups with greater access to political rents. Analyses of immigrants near US coal mines in the early twentieth century support this theory. The article shows how ethnic groups' distribution across industries shapes the evolution of group cleavages and illuminates how decarbonizing transitions away from fossil fuels may reshape identity conflicts

Gender after genocide: how violence shapes long-term political representation

What are the legacies of violence on women’s political representation? We examine the long-term effects of a watershed conflict of the twentieth century: the Khmer Rouge genocide, during which 50–70% of Cambodia’s working-age men were killed. Using original data on mass killings and economic and political conditions in Cambodian communes, we find that genocide exposure is positively associated with women’s economic advancement and present-day indicators of women’s representation in local-level elected office. We conduct in-depth, ethnographic interviews with genocide survivors to explore the mechanisms by which violence spurred women into elected office. A crucial finding emerges: In areas that suffered the genocide’s worst killings, widows obtained economic autonomy, providing a template for the economic advancement of women in traditional households with surviving men. The shift in norms regarding the sexual division of labor and its transmission through intra-communal and intergenerational pathways allowed women to adopt larger public roles over time

Community and Transit in Northwest Denver

An undergraduate senior thesis on community and transit in Northwest Denve

Global governance under populism: the challenge of information suppression

Populists’ ideological opposi0on to global governance is well recognized, yet whether and how these actors systema0cally undermine interna0onal organiza0ons (IOs) remains unclear. We argue that a key means by which populists warp global governance is by distor0ng scien0fic informa0on, which is necessary for global responses to many public health and environmental issues. Populists are mo0vated to withhold or misreport scien0fic informa0on due to their an0-elite, pro-state sovereignty views. Using new data on the source and quality of informa0on provided to IOs, we find that populist leaders are significantly less likely to provide scien0fic informa0on to these organiza0ons than other types of leaders. When they do offer such data, it is less accurate than the informa0on supplied by other sources. Our findings suggest that populism may stymie interna0onal ins0tu0ons’ ability to govern in areas of pressing interna0onal concern

Synaptic Plasticity Can Produce and Enhance Direction Selectivity

The discrimination of the direction of movement of sensory images is critical to the control of many animal behaviors. We propose a parsimonious model of motion processing that generates direction selective responses using short-term synaptic depression and can reproduce salient features of direction selectivity found in a population of neurons in the midbrain of the weakly electric fish Eigenmannia virescens. The model achieves direction selectivity with an elementary Reichardt motion detector: information from spatially separated receptive fields converges onto a neuron via dynamically different pathways. In the model, these differences arise from convergence of information through distinct synapses that either exhibit or do not exhibit short-term synaptic depression—short-term depression produces phase-advances relative to nondepressing synapses. Short-term depression is modeled using two state-variables, a fast process with a time constant on the order of tens to hundreds of milliseconds, and a slow process with a time constant on the order of seconds to tens of seconds. These processes correspond to naturally occurring time constants observed at synapses that exhibit short-term depression. Inclusion of the fast process is sufficient for the generation of temporal disparities that are necessary for direction selectivity in the elementary Reichardt circuit. The addition of the slow process can enhance direction selectivity over time for stimuli that are sustained for periods of seconds or more. Transient (i.e., short-duration) stimuli do not evoke the slow process and therefore do not elicit enhanced direction selectivity. The addition of a sustained global, synchronous oscillation in the gamma frequency range can, however, drive the slow process and enhance direction selectivity to transient stimuli. This enhancement effect does not, however, occur for all combinations of model parameters. The ratio of depressing and nondepressing synapses determines the effects of the addition of the global synchronous oscillation on direction selectivity. These ingredients, short-term depression, spatial convergence, and gamma-band oscillations, are ubiquitous in sensory systems and may be used in Reichardt-style circuits for the generation and enhancement of a variety of biologically relevant spatiotemporal computations

Social Ties and Climate Politics

Climate change is an issue rife with economic risk. The physical impacts of global warming, allowed to intensify by halting international climate cooperation, threaten climate-vulnerable industries and communities. Global transitions away from fossil fuels endanger carbon-intensive economic assets. Whereas climate change is often framed as an issue of global collective action and public goods provision, I instead conceptualize it as one of economic risk and decline. How do workers, voters, and governments perceive and manage mounting "climate risks"? How do they cope with losses stemming from realizations of such risks? I interrogate these questions in reference to the political and economic divisions that exist within and across many of the world's most fossil fuel-intensive and ecologically vulnerable countries. The first two papers of the dissertation consider how ethnoracial divisions within states shape perceptions of climate risks and responses to their realization. In the first, I argue that the ascriptive makeup of an industry serves as a heuristic for evaluating its access to state subsidies and ability to weather climate change and decarbonization. Survey experiments on representative U.S. samples indicate that minority Americans see greater downside risk in industries that hire large numbers of Black workers, expecting those industries to be denied government support as climate risks manifest. Conversely, minorities see less risk in industries that mainly employ white workers, believing those industries to have more benefactors in government. In the second paper, I study how migrants, who have long featured prominently in fossil fuel workforces, politically assimilate amid industrial booms and busts. Whereas scholars often contend that industrial decay aggravates ethnocultural animosities and compounds existing group loyalties, I argue that the starkest intergroup divides can emerge in periods of growth, not decline. When an industry is growing, economic optimism and resources flow across ethnic groups concentrated in that industry, bolstering migrants’ confidence in the ability of coethnics to safeguard their welfare and suppressing investments in political assimilation. Gains from concentration in the industry dissipate amid decline, leading migrants to forge ties with outside groups promising access to political rents previously out of reach. I find support for this theory in the case of the early twentieth century U.S. coal industry. The third paper of the dissertation, coauthored with Richard Clark, explores why some international organizations have retrofit themselves to address climate change despite the intransigence of powerful member states on the issue. We link these pro-climate turns to bureaucrats' socialization in climate-vulnerable countries. As bureaucrats rotate between countries and are promoted, climate concerns then diffuse outwards and upwards, gradually sharpening the climate focus of the institution despite the skepticism of powerful principal states. We find support for this argument in the case of the International Monetary Fund, drawing on original data on bureaucrat career paths and Fund attention to climate change

Climate cascades: IOs and the prioritization of climate action

International organizations (IOs) are rapidly reorienting around climate change, despite powerful principal states having divergent preferences on the issue. When and why do IOs prioritize climate change? We argue that they do so as a result of an endogenous process of staff learning and rotation. IO staff surveil and implement programs in target states. When working in climate-vulnerable countries, they come to see climate change as an issue warranting aggressive action. As these staff are rotated and promoted, interest in climate diffuses outwards and upwards through the institution. To test this theory, we introduce original data tracking the International Monetary Fund's attention to climate change and the career paths of key staff. We complement this with interviews of International Monetary Fund personnel. We find support for our theory

Influence of Glucose and Serum on Connexin 43 Expression in Cultured Mouse Endothelial Cells

The supplier (ATCC) of cultured mouse endothelial cells (bEnd.3) states that those cells should be maintained in a high glucose (10% serum) environment. Previous data gathered from our lab demonstrated that media composition (glucose and serum) impacts the growth rate of these cells. As connexin expression alters cell growth, we were interested in determining whether glucose and serum might alter connexin expression in a way that would affect cell growth. Others have shown that glucose increases endothelial cell connexin 43 expression in vivo. Mouse endothelial cells were grown in mixtures of high (4.5 g/L = 25 mM/L) and low (1 g/L = 5.6 mM/L) glucose with either 10% or 1% serum (fetal bovine FBS). We expect that high glucose and 10% serum, will increase connexin 43 expression which could contribute to the increased growth rate

Replication Data for: The Future of Coal-Fired Power Generation in Southeast Asia

Replication package for: Clark, Richard, Noah Zucker, and Johannes Urpelainen. “The Future of Coal-Fired Power Generation in Southeast Asia.” Renewable and Sustainable Energy Reviews. Forthcoming