Sohini Roy Chowdhury

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IMPORTANCE We observed a significant correlation between cerebrospinal fluid (CSF) levels of tau proteins and α-synuclein, but not β-amyloid 1-42 (Aβ1-42), and lower concentration of CSF biomarkers, as compared with healthy controls, in a cohort of entirely untreated patients with Parkinson disease (PD) at the earliest stage of the disease studied so far.(More)
Containing an epidemic at its origin is the most desirable mitigation. Epidemics have often originated in rural areas, with rural communities among the first affected. Disease dynamics in rural regions have received limited attention, and results of general studies cannot be directly applied since population densities and human mobility factors are very(More)
The development of biomarkers to predict the progression of Parkinson's disease (PD) from its earliest stage through its heterogeneous course is critical for research and therapeutic development. The Parkinson's Progression Markers Initiative (PPMI) study is an ongoing international multicenter, prospective study to validate biomarkers in drug-naïve PD(More)
  • Gordon H Hanson, Chong Xiang, We Thank, Eli Berman, Bob Gibbons, Avner Greif +12 others
  • 2013
In this paper we build a model of market competition among religious denominations, using a framework that involves incomplete contracts and the production of club goods. We treat denominations akin to multinational enterprises, which decide which countries to enter based on local market conditions and their own " productivity. " The model guides us in(More)
  • Chong Xiang, Marcelo Jose Castillo, Sohini Chowdhury, Pia Digirolamo, Georg Schaur, Ashraf Zaman +2 others
  • 2013
In this paper I construct product-level U.S.-manufacturing-imports data for new products. I show that consistent with product cycles, the North's new-products exports to the U.S., relative to its old-products exports, grow faster than the South's for over a decade, and then the South catches up with the North and this pattern is reversed. This finding holds(More)
BACKGROUND Fox Trial Finder is an online registry for individuals with and without Parkinson disease (PD) interested in participating in PD research. However, distance or disability could prevent such individuals from participating in traditional, clinic-based research at major centers. OBJECTIVE Use videoconferencing to connect participants to(More)
This paper evaluates the distortions from specific tariffs levied on agricultural imports by rich countries. Through their non-MFN advalorem equivalents (AVEs), specific tariffs discriminate against exports from poor countries because of the lower price of their exports. So the MFN specific tariffs levied by rich WTO member countries essentially translate(More)
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