Identifying Technology Spillovers and Product Market Rivalry

The impact of R&D on growth through spillovers has been a major topic of economic research over the last thirty years. A central problem in the literature is that firm performance is affected by two countervailing “spillovers” : a positive effect from technology (knowledge) spillovers and a negative business stealing effects from product market rivals. We develop a general framework incorporating these two types of spillovers and implement this model using measures of a firm's position in technology space and productmarket space. Using panel data on U.S. firms, we show that technology spillovers quantitatively dominate, so that the gross social returns to R&D are at least twice as high as the private returns. We identify the causal effect of R&D spillovers by using changes in federal and state tax incentives for R&D. We also find that smaller firms generate lower social returns to R&D because they operate more in technological niches. Finally, we detail the desirable properties of an ideal spillover measure and how existing approaches, including our new Mahalanobis measure, compare to these criteria.     

Determining Process Death Based on Censored Activity Data

This article addresses the problem of estimating the time of apparent death in a binary stochastic process. We show that, when only censored data are available, a fitted logistic regression model may estimate the time of death incorrectly. We improve this estimation by utilizing discrete-event simulation to produce simulated complete time series data. The proposed methodology may be applied to situations where time of death cannot be formally determined and has to be estimated based on prolonged inactivity. As an illustration, we use observed monthly activity patterns from 300 real Open Source Software development projects sampled from Sourceforge.net.     

ASTRONOMICS IN ACTION: THE GRADUATE EARNINGS PREMIUM AND THE DRAGON EFFECT IN SINGAPORE

This paper investigates the return to university education in Singapore using a new estimation strategy related to Chinese traditions where children born in the Year of the Dragon are believed to be superior. Because parents might time the arrival of their offspring on a Dragon year, this causes the Dragon cohort to be larger and university entry to be more competitive. First, we find evidence of a negative “Dragon effect” on university educational attainment. Then, using it as an estimation strategy, we find that university education has a ceteris paribus effect of raising earnings by at least 50% on average. (JEL I21, C26, J30)     

Where to from here? Blue passports,family, career—and Donald Trump

Abstract

In this essay, we offer our stories of family and migration under a Donald Trump presidency. We are a lesbian couple; one of us is a citizen of the United States while the other is a citizen of a Muslim country. We use autoethnographic methods to explore and interrogate our “messy and fabulous” journey of liminality; our journey of belonging and exclusion, where we grapple with issues related to sexuality, family, career, and citizenship. Our “voices” are used both individually and in unison, to highlight our intersectional and relational selves. We intend this work to contribute to the many ways we can better understand and appreciate the bountiful and colorful vistas of lesbian families’ migrant experiences.     

Migration and the senses

Recent scholarship in the sociological subfields of culture and immigration offers several promising directions for studying how people experience the world in embodied ways and move through and across boundaries. Yet, the lack of overlap between fields has left numerous theoretical angles unexplored. In this review, I consider the limited existing scholarship at the intersection of migration and the senses. I discuss literature on the role of sensation during three critical moments of migration: movement, encounter, and return. These moments highlight the sensorially dislocating nature of travel, the felt politics of inclusion and exclusion, and the transporting power of embodied memories. These works dive deep into the everyday realities of bodies on the move that public and academic discourse has previously ignored. I conclude by briefly outlining exciting new directions to expand work connecting migration and the senses and suggest that we begin to explore globalized migrant sensibilities.     

Urban greening and mobility justice in Dhaka’s informal settlements

ABSTRACT

Urban greening in Dhaka, Bangladesh is fraught with injustice for slum dwellers. Access to the commons for the enactment of gardening, farming and foraging by the urban poor, many recent internal migrants from rural areas, is contested by wealthier citizens, developers and political elites. Through qualitative research with households within the informal settlement of Korail in Dhaka’s urban core, and a range of stakeholders in governmental and non-governmental organizations, this study critiques competing policy visions that involve urban greening and urban green infrastructure. Repurposing the conceptual lense of ‘mobility justice’ to analyse environmental and ecological issues in the global South, the findings highlight the importance of mobility concerns to just futures for urban planning.     

Calibrating the go-along for the Anthropocene

ABSTRACT

This article contends that the ‘go-along’ contains more technical and ontological agility as a methodology for social research than is often assumed. After distinguishing the central spectrums of technical and ontological agility rooted in different research designs and philosophical orientations, I examine how researchers can nourish it while refining the go-along’s moral purpose in the context of environmental and related mobility crises that define the Anthropocene. I argue researchers can cultivate the go-along’s agility and moral purpose by deploying it with a quantitative context, comparing go-along case studies, moving past human supremacism and illuminating ecologically just forms of mobility that respect other species of life and their habitats. To show one way that the go-along can accomplish these things, I present two vignettes of cycling in urban Canada, drawing on a mobile video ethnography of cycling, a funded study in sociology, conducted between 2014 and 2018.