Basically, I'm not interested in doing research and I never have been. I'm interested in understanding, which is quite a different thing. And often to understand something you have to work it out yourself because no one else has done it. — David Blackwell
Working Papers:
Implementability without Quasilinearity: The Rochetian Approach, (new version), What is new? Positive income effects in Section 5.2
--the previous version (pdf) , Slides for ESWC2025
Informational Separability and Entropy, (pdf), Journal of Economic Theory, Vol. 216, Mar 2024.
Optimal Interval Division, (pdf), Economic Journal, Vol. 132, Jan 2022.
Old version(2015) (some typos in the old version are corrected here), "monotone comparative statics for cutoffs" (2016).
Informational Herding, Optimal Experimentation, and Contrarianism, (pdf), Review of Economic Studies, Lones Smith, Peter Sørensen, and Jianrong Tian, Vol. 88, Oct 2021.
-About my work in this paper, please see ''Research Note on My Work in This Paper."
-The result of Contrarianism is elaborated on here ''Coarse Information Design in SST(2021) and Tian(2022), a Brief Review".
A Note on Extreme Transfers, (pdf), Sep 2024, incorporated into ''Implementability without Quasilinearity."
A Comment on Miller (2023)'s Endpoint Rule, Sep 2024, a permanent working paper.
Some Tools for Microeconomic Analysis, a Note, (pdf), Jul 2024.
A note on ''implementing monotone allocations: the Rochetian approach" and other related thoughts, (pdf), Jul 2024.
Implementing Monotone Allocations: The Rochetian Approach, (pdf), Jianrong Tian and Ju Hu, Jan 2024. (An advertisement: The editor was Barbara Nordin, who is great! I strongly recommend her editing services.)
-This log documents the development of the paper, with a focus on (1) how I conceived the research idea and developed the novel cyclical monotonicity condition, Theorems 1 and 2, and related observations under the full-range assumption (my 23/November/2023 draft); and (2) how I later resolved the assumption issues. My response to concerns about footnote attribution.
-I wrote the second version, circulated as ''On (Strong) Implementability" and ''(Strong) Implementability with Transfer," at Peking U based on feedbacks. I would like to extend special thanks to Ludvig Sinander for his invaluable and detailed feedback, which helped me rethink the contribution of the paper. Some sentences in the paper were directly from his comments. An amazing guy!
-I wrote the third version, circulated as ''Implementability without Quasilinearity," at Barcelona when I was on job market.
Informational Inertia, (pdf), Lones Smith and Jianrong Tian, Sep 2012.
-It was based on my second-year field paper. The case of multiple actions was incorporated in ''Informational Herding, Optimal Experimentation, and Contrarianism" joint with Lones and Peter.