In addition to his primary role as academic researcher and teacher, Tumlinson is also Founder and Managing Partner of a small firm, ZIVIS LLC, engaged primarily in the advisement of so-called angel investors and management of non-traditional investment assets. Prior to founding ZIVIS, he analysed deals and managed portfolio firms for Earlybird, a Munich based, early-stage, venture capital firm. He has also served as Senior Lecturer at Loughborough University, Research Fellow of the Ifo Institute for Economic Research at the University of Munich, Visiting Professor at EM Lyon Grand Ecole and in a variety of positions at Intel where he researched advanced networking technologies, advised capital equipment decisions, global manufacturing operations and Intel Capital’s investment strategy.
Qualifications
PhD (UC-Berkeley), MS (UC-Berkeley), MSE (UC-Berkeley), BSE (Northern Arizona U.)
Links
Research interests
Justin studies the information economics of teams, how they form and when they do not, the incentives of team members and loners, as well as teamwork's impact on public and private welfare. This study often extends to the unique behaviour of entrepreneurs as individuals and shareholders operating as groups. Although primarily an applied game-theorist, he also examines questions empirically. More broadly, Tumlinson enjoys applying formal analytics to controversial topics typically associated with softer debate.
Research projects
PhD Students:
Yihui Cao (in progress, Loughborough University)
Topic: Economics of Education
Andi Widianto (in progress; Loughborough University)
Topic: Societal Impacts of Privatization
Placement: Bank of Indonesia
Dr. Lena Langosch (2020; Loughborough University)
Topic: Culture’s Role in Business Partnerships
Placement: Lecturer, University of Greenwich
Tumlinson supervises PhD students with strong quantitative skills in a wide range of substantive topics
Key publications | Publications by category | Publications by year
Key publications
Hegde D, Tumlinson J (2020). Information frictions and entrepreneurship.
Strategic Management Journal,
42(3), 491-528.
DOI.
Morgan J, Tumlinson J (2019). Corporate Provision of Public Goods.
Management Science,
65(10), 4489-4504.
Full text.
DOI.
Hegde D, Tumlinson J (2014). Does social proximity enhance business partnerships? theory and evidence from ethnicity's role in U.S. venture capital.
Management Science,
60(9), 2355-2380.
Abstract:
Does social proximity enhance business partnerships? theory and evidence from ethnicity's role in U.S. venture capital
We develop a formal model to understand the selection and influence effects of social proximity (homophily) between business partners. Consistent with the model's predictions, we find that U.S. venture capitalists (VCs) are more likely to select start-ups with coethnic executives for investment, particularly when the probability of the start-up's success appears low. Ethnic proximity between VCs and the start-ups they invest in is positively related to performance, measured by the probability of the companies' successful exit through acquisitions and initial public offerings (IPOs) and net income after IPO. Two-stage regression estimates suggest that these positive performance outcomes are largely due to influence, that is, superior communication and coordination between coethnic VCs and start-up executives after the investment. To the extent that VCs expect to work better with coethnic start-ups, they invest in coethnic ventures that are of lower observable quality than noncoethnic ventures.
Abstract.
DOI.
Publications by category
Journal articles
Hegde D, Tumlinson J (2020). Information frictions and entrepreneurship.
Strategic Management Journal,
42(3), 491-528.
DOI.
Morgan J, Tumlinson J (2019). Corporate Provision of Public Goods.
Management Science,
65(10), 4489-4504.
Full text.
DOI.
Triebs TP, Tumlinson J (2019). Learning to forecast business conditions - Evidence from German reunification. CESifo DICE Report, 17(3), 28-29.
Tumlinson J, Hegde D (2016). Does social proximity enhance business relationships?. CESifo DICE Report, 14(3), 36-42.
Hegde D, Tumlinson J (2014). Does social proximity enhance business partnerships? theory and evidence from ethnicity's role in U.S. venture capital.
Management Science,
60(9), 2355-2380.
Abstract:
Does social proximity enhance business partnerships? theory and evidence from ethnicity's role in U.S. venture capital
We develop a formal model to understand the selection and influence effects of social proximity (homophily) between business partners. Consistent with the model's predictions, we find that U.S. venture capitalists (VCs) are more likely to select start-ups with coethnic executives for investment, particularly when the probability of the start-up's success appears low. Ethnic proximity between VCs and the start-ups they invest in is positively related to performance, measured by the probability of the companies' successful exit through acquisitions and initial public offerings (IPOs) and net income after IPO. Two-stage regression estimates suggest that these positive performance outcomes are largely due to influence, that is, superior communication and coordination between coethnic VCs and start-up executives after the investment. To the extent that VCs expect to work better with coethnic start-ups, they invest in coethnic ventures that are of lower observable quality than noncoethnic ventures.
Abstract.
DOI.
Blankenship V, Tumlinson J, Sims MA (1995). A STELLA-II teaching simulation of the dynamics of action model.
Behavior Research Methods, Instruments, & Computers,
27(2), 244-250.
Abstract:
A STELLA-II teaching simulation of the dynamics of action model
Although the Atkinson and Birch (1970) dynamics of action model of behavior is included in many textbooks, the details of the model are left out. To facilitate the teaching of the full theory, the conceptual model is outlined, research findings are reviewed, and a simulation model using STELLA-II is presented. STELLA-II, an icon-based program, provides a visual representation of the model that students can follow, with graphical and tabular output and animation of the rise and fall of parameter values. © 1995 Psychonomic Society, Inc.
Abstract.
DOI.
Blankenship V, Schorie SS, Shaw AJ, Tumlinson J (1994). Teaching the Rescorla-Wagner model using STELLA-II.
Behavior Research Methods, Instruments, & Computers,
26(2), 128-133.
Abstract:
Teaching the Rescorla-Wagner model using STELLA-II
Although the Rescorla-Wagner model is widely taught in learning courses, most textbooks present a simplified version that does not contain all of its parameters. On the basis of Rescorla and Wagner 1972) and the Turbo PASCAL program by Lachnit, Schneider, Lipp, and Kimme! (1988), we created a simulation using STELLA-II, an icon-based program by High Performance Systems, Inc. We argue that this simulation facilitates teaching the complete Rescorla-Wagner model. Using trans-switching (Kimmel & Ray, 1978; Lachnit, 1986; Murrin & Kimmel, 1986) as an example, we demonstrate the effectiveness of the STELLA-II version of the Rescorla-Wagner model as a heuristic tool. © 1994 Psychonomic Society, Inc.
Abstract.
DOI.
Publications by year
2020
Hegde D, Tumlinson J (2020). Information frictions and entrepreneurship.
Strategic Management Journal,
42(3), 491-528.
DOI.
2019
Morgan J, Tumlinson J (2019). Corporate Provision of Public Goods.
Management Science,
65(10), 4489-4504.
Full text.
DOI.
Triebs TP, Tumlinson J (2019). Learning to forecast business conditions - Evidence from German reunification. CESifo DICE Report, 17(3), 28-29.
2016
Tumlinson J, Hegde D (2016). Does social proximity enhance business relationships?. CESifo DICE Report, 14(3), 36-42.
2014
Hegde D, Tumlinson J (2014). Does social proximity enhance business partnerships? theory and evidence from ethnicity's role in U.S. venture capital.
Management Science,
60(9), 2355-2380.
Abstract:
Does social proximity enhance business partnerships? theory and evidence from ethnicity's role in U.S. venture capital
We develop a formal model to understand the selection and influence effects of social proximity (homophily) between business partners. Consistent with the model's predictions, we find that U.S. venture capitalists (VCs) are more likely to select start-ups with coethnic executives for investment, particularly when the probability of the start-up's success appears low. Ethnic proximity between VCs and the start-ups they invest in is positively related to performance, measured by the probability of the companies' successful exit through acquisitions and initial public offerings (IPOs) and net income after IPO. Two-stage regression estimates suggest that these positive performance outcomes are largely due to influence, that is, superior communication and coordination between coethnic VCs and start-up executives after the investment. To the extent that VCs expect to work better with coethnic start-ups, they invest in coethnic ventures that are of lower observable quality than noncoethnic ventures.
Abstract.
DOI.
1995
Blankenship V, Tumlinson J, Sims MA (1995). A STELLA-II teaching simulation of the dynamics of action model.
Behavior Research Methods, Instruments, & Computers,
27(2), 244-250.
Abstract:
A STELLA-II teaching simulation of the dynamics of action model
Although the Atkinson and Birch (1970) dynamics of action model of behavior is included in many textbooks, the details of the model are left out. To facilitate the teaching of the full theory, the conceptual model is outlined, research findings are reviewed, and a simulation model using STELLA-II is presented. STELLA-II, an icon-based program, provides a visual representation of the model that students can follow, with graphical and tabular output and animation of the rise and fall of parameter values. © 1995 Psychonomic Society, Inc.
Abstract.
DOI.
1994
Blankenship V, Schorie SS, Shaw AJ, Tumlinson J (1994). Teaching the Rescorla-Wagner model using STELLA-II.
Behavior Research Methods, Instruments, & Computers,
26(2), 128-133.
Abstract:
Teaching the Rescorla-Wagner model using STELLA-II
Although the Rescorla-Wagner model is widely taught in learning courses, most textbooks present a simplified version that does not contain all of its parameters. On the basis of Rescorla and Wagner 1972) and the Turbo PASCAL program by Lachnit, Schneider, Lipp, and Kimme! (1988), we created a simulation using STELLA-II, an icon-based program by High Performance Systems, Inc. We argue that this simulation facilitates teaching the complete Rescorla-Wagner model. Using trans-switching (Kimmel & Ray, 1978; Lachnit, 1986; Murrin & Kimmel, 1986) as an example, we demonstrate the effectiveness of the STELLA-II version of the Rescorla-Wagner model as a heuristic tool. © 1994 Psychonomic Society, Inc.
Abstract.
DOI.
- Founder and Managing Partner, ZIVIS LLC,
- Fellow, Alexander von Humboldt Foundation
Awards and Honours
- German Chancellor’s Scholar
- Fulbright Fellow
- Bosch Future Leaders of America Fellow
- National Science Foundation Graduate Research Fellow
