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Ulrich Kaiser

@ulrichkaiser.bsky.social

970 followers 1.1K following 150 posts

Prof. of Entrepreneurship @UZH_en & @CBScph, research fellow @ZEW and @IZA_bonn. @IEP_Journal editor Zürich🇨🇭Stäfa🇨🇭Dejret🇩🇰 https://t.co/T2sAPe5yGy

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Ulrich Kaiser @ulrichkaiser.bsky.social · Sep 5

📣📣📣WE ARE HIRING AT UNI ZURICH📣📣📣

Want to work in a super attractive environment and you are an #innovation scholar?

⏩ Apply here: jobs.uzh.ch/job-vacancie....

(pic taken frommy office)

Reposted by Yana van der Meulen Rodgers, Ulrich Kaiser

ECON5k @econ5k.bsky.social · Nov 10

2025 #ECON5k is coming! Updated website here: sites.google.com/view/econ5k. Details+link to t-shirts. 5 colors this year!

Follow this account for more details + running celebration December + info about group runs at the meetings in SF!

+Contact [email protected] to be added to email list.

Home

Economists running @econ5k.bsky.social [email protected]

sites.google.com

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Ulrich Kaiser @ulrichkaiser.bsky.social · Feb 25

Check here: www.linkedin.com/feed/update/...

Ulrich Kaiser on LinkedIn: #zurich #basel #appenzell #jura #neuchatel #nidwalden #obwalden #saint…

♀️♀️♀️EPISODE 2♀️♀️♀️ of 🇨🇭🇨🇭🇨🇭 WOMEN STARTUPS AND WHERE TO FIND THEM 🇨🇭🇨🇭🇨🇭 In our last episode (https://lnkd.in/d5C7vHn9) we discussed where…

www.linkedin.com

Ulrich Kaiser @ulrichkaiser.bsky.social · Feb 25

♀️♀️♀️EPISODE 2♀️♀️♀️

of

🇨🇭🇨🇭 WOMEN STARTUPS AND WHERE TO FIND THEM 🇨🇭🇨🇭

In our last episode (lnkd.in/d5C7vHn9) we discussed where to find ♀️ startups (relative to ♂️ startups) in general so the next question to be answered is:

WHERE DO WE FIND WOMEN GROWTH-ORIENTED VS WOMEN NON GROWTH-ORIENTED STARTUPS?

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Ulrich Kaiser @ulrichkaiser.bsky.social · Feb 24

if such terms were unavailable, via Gender API (in combination with information of the country of origin). Manuel Bolz provided superb research assistence.

Ulrich Kaiser @ulrichkaiser.bsky.social · Feb 24

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,

Ulrich Kaiser @ulrichkaiser.bsky.social · Feb 24

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.

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Ulrich Kaiser @ulrichkaiser.bsky.social · Feb 24

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.

Ulrich Kaiser @ulrichkaiser.bsky.social · Feb 24

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).

Ulrich Kaiser @ulrichkaiser.bsky.social · Feb 24

♀️♀️♀️ 🇨🇭🇨🇭🇨🇭 Women Startups and Where to Find Them 🇨🇭🇨🇭🇨🇭♀️♀️♀️:

Well, what is a "women startup" in the first place? It's a new business registration on the Swiss Business Register (www.zefix.ch) which has more women founders than men founders.

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Ulrich Kaiser @ulrichkaiser.bsky.social · Feb 19

Jetzt wirds knapp.

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Ulrich Kaiser @ulrichkaiser.bsky.social · Feb 15

Ruf mal beim Gemeindeamt Deines letzten Wohnsitzes an. Das hat bei uns geklappt.

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Ulrich Kaiser @ulrichkaiser.bsky.social · Feb 15

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.

Ulrich Kaiser @ulrichkaiser.bsky.social · Feb 15

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.

Ulrich Kaiser @ulrichkaiser.bsky.social · Feb 15

For instance, we were able to proxy investment in customer retention that is usually difficult to measure, via the number of game updates.

Ulrich Kaiser @ulrichkaiser.bsky.social · Feb 15

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.

Ulrich Kaiser @ulrichkaiser.bsky.social · Feb 15

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.

Ulrich Kaiser @ulrichkaiser.bsky.social · Feb 15

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.

Ulrich Kaiser @ulrichkaiser.bsky.social · Feb 15

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.

Ulrich Kaiser @ulrichkaiser.bsky.social · Feb 15

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.

Ulrich Kaiser @ulrichkaiser.bsky.social · Feb 15

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.

Ulrich Kaiser @ulrichkaiser.bsky.social · Feb 15

It all started at a meeting of the Industrial Economics field committee of the Verein für Socialpolitik e.V. meeting in Regensburg back in 2016 (superbly organized by Andreas Roider).

And it's now accepted for publication in

Management Science.

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Ulrich Kaiser @ulrichkaiser.bsky.social · Feb 15

Wegen Gerhard Baum bin ich 1989 in FDP eingetreten.

Wegen Guido Westerwelle (im Nachhinein ein Guter) 2006 wieder ausgetreten.

www.spiegel.de/politik/deut...

(S+) Zum Tod von Gerhart Baum: Der letzte aufrechte Liberale

Der frühere Bundesinnenminister Gerhart Baum ist tot. Er war aktiv und mischte sich bis ins hohe Alter ein. Und er litt bis zuletzt an seiner FDP.

www.spiegel.de

Ulrich Kaiser @ulrichkaiser.bsky.social · Feb 6

Vielleicht müssen wir dann auch alle um 5 Uhr aufstehen, gerade wir faulen Städter.

Reposted by Ulrich Kaiser

Open Data Kanton Zürich @opendatazh.bsky.social · Feb 6

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

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Ulrich Kaiser @ulrichkaiser.bsky.social · Feb 3

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.

Ulrich Kaiser @ulrichkaiser.bsky.social · Feb 3

There is a new Kaiser in the house, and it is Franziska Kaiser, our new post-doctoral student who is joining us from HEC Lausanne.

Welcome Franziska!

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Ulrich Kaiser @ulrichkaiser.bsky.social · Jan 6

Thanks to Christian Ehring and Rheinische Post, I've had my four seconds of fame this morning.

Reposted by Ulrich Kaiser, Janne Tukiainen, Marcos Vera‐Hernández , and 4 more Ulrich Kaiser, Janne Tukiainen, Marcos Vera‐Hernández, Marina Della Giusta, Guido Heineck, Bruno Martorano, Cheti Nicoletti

Pedro Sant’Anna @pedrosantanna.bsky.social · Jan 3

I've decided to collect my DiD materials in a single place.

psantanna.com/did-resources

There, you will find
- 14 lectures of my comprehensive DiD course
- Shorter lectures/talks I have given on DiD
- My DiD R/Stata/Python packages
- Some DiD checklists
- DiD materials from my friends

Enjoy!

Pedro H. C. Sant’Anna

psantanna.com

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Ulrich Kaiser @ulrichkaiser.bsky.social · Dec 30

Great stuff:

Pedro Sant’Anna @pedrosantanna.bsky.social · Dec 30

Here are the first five sets of slides:

01 Introduction: psantanna.com/DiD/01_Intro...

02 Classical 2x2 setup: psantanna.com/DiD/02_two_b...

03 Clustering issues: psantanna.com/DiD/03_Clust...

04 Functional form: psantanna.com/DiD/04_Funct...

05 Covariates: psantanna.com/DiD/05_Covar...