In: International Journal of Earth Sciences, 2015, vol. 104, no. 5, p. 1337-1352
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In: WWW '20: Proceedings of The Web Conference 2020, 2020, vol. April, p. 1851-1862
Finding social influencers is a fundamental task in many online applications ranging from brand marketing to opinion mining. Existing methods heavily rely on the availability of expert labels, whose collection is usually a laborious process even for domain experts. Using open-ended questions, crowdsourcing provides a cost-effective way to find a large number of social influencers in a short...
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In: Journal of Applied Econometrics, 2020, p. 481-504
This paper proposes a nonparametric method for evaluating treatment effects in the presence of both treatment endogeneity and attrition/non-response bias, based on two instrumental variables. Using a discrete instrument for the treatment and an instrument with rich (in general continuous) support for non-response/attrition, we identify the average treatment effect on compliers as well as the...
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In: Science Advances, 2020, vol. 6, no. 41, p. eabb8227
The origins and development of the arid and highly seasonal steppe-desert biome in Central Asia, the largest of its kind in the world, remain largely unconstrained by existing records. It is unclear how Cenozoic climatic, geological, and biological forces, acting at diverse spatial and temporal scales, shaped Central Asian ecosystems through time. Our synthesis shows that the Central Asian...
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In: Swiss Journal of Geosciences, 2007, vol. 100, no. 3, p. 443-455
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In: International Journal of Earth Sciences, 2011, vol. 100, no. 5, p. 1147-1162
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In: International Journal of Earth Sciences, 2004, vol. 93, no. 6, p. 1008-1024
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In: Swiss Journal of Geosciences, 2009, vol. 102, no. 3, p. 441-456
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In: International Journal of Earth Sciences, 2009, vol. 98, no. 8, p. 2009-2022
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In: Swiss Journal of Geosciences, 2008, vol. 101, no. 3, p. 595-603
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