Johannes Kleinhempel

If you read my work, I have always loved using em-dashes. Now I actually go through & replace them with semicolons or parentheses (even when dashes would be better) because people assume they are AI

Reminds me of the great Delve Collapse - use of the word dropped after it became associated with AI.

"Some unfortunate news from the USPTO - it looks like the agency will be forced to terminate the PatentsView contract, so all the datasets and disambiguation currently available at patentsview.org will likely go offline on March 28."

Race to the Bottom: Competition and Quality in Science* Abstract. This paper investigates how competition to publish first and thereby establish priority impacts the quality of scientific research. We begin by d

Recently accepted by #QJE, “Race to the Bottom: Competition and Quality in Science” by Hill and Stein: doi.org/10.1093/qje/...

Real footage of a synthetic control model

Construct Validity FTW

www.scribbr.com/methodology/...

The Economist covered our "Strain on scientific publishing" paper.

What is this all about?

We collectively churn out more & more papers *per scientist*, an increasing pace, in a rapidly changing publication landscape.

Why? How? Want to make sense of this? 🧵

www.economist.com/science-and-...

A starter pack for anyone interested in research on #entrepreneurship, in all of its forms, and its impact. Let me know who I am missing and I will add them.

go.bsky.app/5saxyhy

June 25-27
Submission deadline: March 1, 2025

www.druid.dk

DRUID has become one of the world's premier academic conferences on innovation and the dynamics of institutional and geographic change. DRUID invites scholars to contribute with a paper to DRUID25, hosted by Rotman School of Management.

Realizing expectations? High-impact entrepreneurship across countries - Small Business Economics Comparative international entrepreneurship research has often used measures of high-growth expectations entrepreneurship to proxy for the construct of high-impact entrepreneurship. We revisit this pra...

Our analyses bring into question current survey-based approaches to measuring high-impact entrepreneurship and existing rankings of countries’ entrepreneurial performance, with important implications for #EntrepreneurshipTheory and #EntrepreneurshipPolicy.

Open-access link: doi.org/10.1007/s111...

Furthermore, we find that opportunity-motivated entrepreneurship #GEM #TEAOPP —another commonly used measure—also does not proxy well for high-impact entrepreneurship.

We then introduce the notion of entrepreneurial projection bias to gauge the misfit between expectations and realizations. This could arise because of systematic differences in entrepreneurial overconfidence or overoptimism, or structural impediments to venture growth.

We revisit this practice by assessing the cross-country association between high-growth expectations & realized high-impact entrepreneurship.

We find that expectations are not a good proxy for realizations; they are associated with different determinants and outcomes, respectively.

Comparative international entrepreneurship research has often used measures of high-growth expectations entrepreneurship to proxy for the construct of high-impact entrepreneurship.

How do we measure entrepreneurial activity at the country level, especially in terms of economically relevant high-impact entrepreneurship?

“Realizing expectations?” with Saul Estrin at #SmallBusinessEconomics doi.org/10.1007/s111...

In sum, our study highlights the durability, portability, and intergenerational transmission of entrepreneurial culture as well as the profound impact of national culture on entrepreneurship. (10/n)

@orgscience.bsky.social

the positive effect of country-of-ancestry entrepreneurial culture on 2nd-generation immigrant entrepreneurship increases in parenting intensity because more intense parent-child interactions strengthen the intergenerational transmission of entrepreneurial culture. (9/n)

We also show our findings are robust to alternative non-cultural explanations (e.g., financial resources, labor market discrimination, skills, direct parent-child linkages) and we highlight the critical role of intergenerational cultural transmission: (8/n)

...we show that country-of-ancestry entrepreneurial culture is positively associated with the likelihood that second-generation immigrants are entrepreneurs. (7/n)

Using two independent samples—65,323 second-generation immigrants of 52 different ancestries in the United States and 4,165 second-generation immigrants of 31 ancestries in Europe— ... (6/n)

We argue that entrepreneurship is influenced by durable, portable, and intergenerationally transmitted cultural imprints such that 2nd-generation immigrants are more likely to be entrepreneurs if their parents originate from countries with a strong entrepreneurial culture. (5/n)

In the study, we use second-generation immigrant entrepreneurship as the empirical context to study the role of national culture in entrepreneurship. (4/n)

Since entrepreneurship and the economic, formal institutional, and cultural characteristics of countries are deeply intertwined, it is difficult to isolate the effect of culture on entrepreneurship. (3/n)

For more than a century, scholars have argued that culture drives entrepreneurship. However, empirical research has produced mixed & conflicting findings. (2/n)

National culture is a deeply rooted determinant of entrepreneurship & cultural imprints are durable, portable, and intergenerationally transmitted such that they persist over at least two generations and in different economic & institutional contexts doi.org/10.1287/orsc... (1/n)