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Open access Sep 2026

Barriers Within Borders

Domestic markets can be far from fully integrated within a country: Canada's interprovincial trade is half the size of its international trade. We estimate internal trade costs using bilateral flows across hundreds of products and sectors and decompose them into geographic and non-geographic components. Embedding these...

Federico J. Díez, Trevor Tombe, Yuan Yang · 0 citations
Review 2026

Impact of Sleep Quality on the Quality of Life of Medical Students: A Study on the Mediating Role of Depression

: To examine the relationships among sleep quality, depression, and quality of life (physical and mental health) in medical students, and to explore the mediating role of depression, a cross-sectional survey of 857 medical students was conducted using the SF-36, PSQI, and CES-D. Correlation and mediation analyses (PROC...

Bin Wang, Yue-Han Zhu, Da-Wei Liu et al. · 0 citations

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