Ulrich Kaiser
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ulrichkaiser.bsky.social
Ulrich Kaiser
@ulrichkaiser.bsky.social
Prof. of Entrepreneurship @UZH_en
& @CBScph, research fellow @ZEW
and @IZA_bonn.

@IEP_Journal editor

Zürich🇨🇭Stäfa🇨🇭Dejret🇩🇰


https://t.co/T2sAPe5yGy
if such terms were unavailable, via Gender API (in combination with information of the country of origin). Manuel Bolz provided superb research assistence.
February 24, 2025 at 4:37 PM
Our data starts in March 2016 and ends December 2023. The figures shown are averaged across Swiss municipalities. We identified founders as female vs mal via gendered terms such as Staatsbürgerin (female citizen in German) and,
February 24, 2025 at 4:37 PM
Where's the data from? We downloaded it via the Zefix API in cooperation with Chiron Services and with financial support by Swiss National Science Foundation SNSF as well as Innosuisse.
February 24, 2025 at 4:37 PM
The ratio of women to men startups is 0.322 (i.e., for three men startups there is one women startup) across municipalities, similar to basically all other countries we tend to compare us with.
February 24, 2025 at 4:37 PM
So, where to find them? Mostly in the cantons of Basel city and Zurich but rarely in Appenzell-Innerhoden, Schaffhausen or Neuchatel. They are also more likely to be found in rural and "intermediate" areas than in cities (which offer better options in dependent employment).
February 24, 2025 at 4:37 PM
Jetzt wirds knapp.
February 19, 2025 at 3:42 PM
Ruf mal beim Gemeindeamt Deines letzten Wohnsitzes an. Das hat bei uns geklappt.
February 15, 2025 at 6:19 PM
At the same time, the journey was also super rewarding, we got really good comments from reviewers and editors, and I am really proud of this very elegant paper that I think is both relevant and rigorous.
February 15, 2025 at 6:17 PM
It's been a very long journey. It's been so long that two new kids arrived in the meantime (not in my household). And a pandemic. And my hair turned grey, at least the bit that remained.
February 15, 2025 at 6:17 PM
For instance, we were able to proxy investment in customer retention that is usually difficult to measure, via the number of game updates.
February 15, 2025 at 6:17 PM
This brought a new and very amazing coauthor, Reinhold Kesler (now Düsseldorf Institute for Competition Economics (DICE)) who pushed the empirical part to a very high level.
February 15, 2025 at 6:17 PM
The model derives empirically testable hypotheses that we... do no longer test using German magazine data. We use a nowadays much more relevant market instead, online games.
February 15, 2025 at 6:17 PM
The beauty of the model is that it cannot only explain phenomena observable in the real world, but it also arrives at conclusions that off-the shelf theory would not arrive at. E.g., the mapping between market value and product variety is inverted u-shaped.
February 15, 2025 at 6:17 PM
The model shows that both variables are substitutes. The mechanism here is that a firm can keep its existing consumers by investment in customer retention but can also attract switching consumers from rivals by a larger portfolio size.
February 15, 2025 at 6:17 PM
Standard micro theory can't really explain this phenomenon.

Markus got back to me from Regensburg a few weeks later with a sketch of a theoretical model that featured the interplay between investing in portfolio size and investing in consumer retention.
February 15, 2025 at 6:17 PM
It all started with the question "Why do so many magazine publishers have multiple titles in the exact same segment?" (yes, magazine, it was 20169 that I asked one of my absolute favorite applied micro theorists, Markus Reisinger of Frankfurt School of Finance & Management.
February 15, 2025 at 6:17 PM
Vielleicht müssen wir dann auch alle um 5 Uhr aufstehen, gerade wir faulen Städter.
February 6, 2025 at 7:19 PM
Reposted by Ulrich Kaiser
Das Delta zwischen Besuchenden (in unserem Katalog) und Downloads zeigt schön, wie wichtig Multiplikatoren wie data.europa.eu sind. Und wie unnötig Kantonsgrenzen für Daten sind.
The official portal for European data | data.europa.eu
Discover the single point of access to open data from European countries, EU institutions, agencies and bodies and other European countries.
data.europa.eu
February 6, 2025 at 10:18 AM
Full disclosure: no, Franziska and I do *not* share a common family heritage. She is, however, a member of my academic family heritage - she was supervised by Christian Peukert, who was a post-doc at the chair many years ago.
February 3, 2025 at 1:29 PM