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Open source software (OSS) is an economic paradox. Development of open source software is often done by unpaid volunteers and the “source code” is typically freely available. Surveys suggest that status, signaling, and intrinsic motivations play an important role in inducing developers to invest effort. Contribution to an OSS project is rewarded by adding(More)
This paper exploits a unique data set on the payment card industry to study issues associated with network effects and two-sided markets. We show that consumers concentrate their spending on a single payment network (single-homing), although many maintain unused cards that allow the ability to use multiple networks (multihoming). Further, we establish a(More)
This paper is concerned with the effects of antitrust policy in markets in which innovation is a critical determinant of competitive outcomes and welfare. Over the last two decades, a large share of the economy—the so-called “new economy”—has emerged that shares this feature (see, for example, David S. Evans and Richard Schmalensee 2002). Traditionally,(More)
BACKGROUND Despite a recent ideological shift towards the recognition of sexual autonomy for people with an intellectual disability (ID), there are continuing social and cultural barriers to sexual expression. Part I of the current two-part study assessed the sexual knowledge, experiences and aspirations of service users through focus groups and also(More)
A planner sets a lump sum transfer and a linear tax on labor income in an economy with incomplete markets, heterogeneous agents, and aggregate shocks. The planner’s concerns about redistribution impart a welfare cost to fluctuating transfers. The distribution of net asset holdings across agents affects optimal allocations, transfers, and tax rates, but the(More)
BACKGROUND Recent ideological shifts in service provision promote appropriate sexual expression for people with an intellectual disability (ID), although there is little evidence that such advances in ideology are matched by current service provision. Part II of the current two-part study assessed the attitudes of staff and family carers to the sexuality of(More)
Software platforms are a critical component of the computer systems underpinning leading-edge products ranging from third-generation mobile phones to video games. After describing some key economic features of computer systems and software platforms, the paper presents case studies of personal computers, video games, personal digital assistants, smart(More)
BACKGROUND Although the Irish farming population is a significant occupational group, analysis of their mortality patterns is limited. This study compared mortality trends with other occupational groups and assessed the impact of socio-economic factors. METHODS Population and mortality data (2000-06) were obtained to calculate standardized mortality(More)