szalas

Sebastian
Zalas

PhD student in economics at University of Warsaw.

Opublikowane | Published

2024
Gender board diversity across Europe throughout four decades | Nature Scientific Data

We present a Gender Board Diversity Dataset (GBDD), which provides a cross-country perspective on women in management and supervisory boards that spans between 1985 and 2020. The data covers 43 European countries and accounts for private companies in addition to the stock-listed ones. GBBD was created using firm-level Orbis data. Our measures are based on a sample of more than 28 million unique firms observed for nearly seven years on average and reporting data about nearly 59 million individuals on management and supervisory boards. We provide the measures at the level of industry, country and year (the firm-level data is proprietary). We provide three measures. The first is the share of women among all board members in a given industry, country, and year. The second one is the average of the shares of women across firms in a given industry, country and year. We also provide a new measure: the share of firms in a given industry, country and year which report no single woman on their board(s).

 

Replication codes | Data

Hubert
Drążkowski
Joanna
Tyrowicz
Sebastian
Zalas
The evolution of labor share in Poland. New evidence from firm-level data | Gospodarka Narodowa

The only accessible source of financial firm-level in Poland data is database prepared by Central Statistical Office (CSO), available for only minor group of economists. Our study aim at providing to wider audience Orbis database, providing information about substantial part of Polish firms. With this data we present the evolution of labor share of value added in Poland, together with labor productivity and wages. We compare our estimates with indicators prepared by Growiec (2009) and national accounts data. We find that different data source produce differing levels of indicators, however its shapes remain similar. Furthermore we show how construct database using Orbis data and how to improve its coverage using imputation methods.

Sebastian
Zalas
Hubert
Drążkowski

W toku | Work in progress

  • Women in top corporate positions and the labor share: evidence from European firms

    The paper studies the representation of women in top corporate positions and the workers’ share of firms’ income. Using a large panel of European firms and identification from a shift–share instrument, the author estimates the effect of gender board diversity on the labor share. In the preferred specification, a 10 percentage point increase in gender board diversity is associated with a 0.75 percentage point rise in the labor share. The effect is stronger in services, in smaller firms, and among firms with persistently low productivity. A counterfactual analysis demonstrates a high semi-elasticity of employment as the driving mechanism behind these findings.

    Sebastian
    Zalas
  • Revisiting gender board diversity and firm performance

    We study the effects of gender board diversity on firm performance. We use novel and rich firm-level data covering nearly 6 million private and public firms spanning the years 1995-2020 in Europe. We augment a standard TFP estimation with firm fixed effects to explore the role of gender board diversity. We construct a shift-share instrument for gender board diversity and find that increasing the share of women on boards is conducive to better economic performance. The results prove robust to a variety of sensitivity analysis. This outcome is driven primarily by firms from the service sector and by smaller firms. The impact was stronger during the early years of our sample.

    Joanna
    Tyrowicz
    Sebastian
    Zalas
    Katarzyna
    Bech

Ekonometria - Semestr zimowy 2025/26

Kontakt (adres e-mail): pierwsza litera imienia, kropka, nazwisko @uw.edu.pl

Konsultacje: online lub stacjonarniepo wcześniejszym kontakcie mailowym

Strona wykładu: [link]

Ogłoszenia:

  1. W dniu 23.10.2025 zapraszam do sali komputerowej (numer sali dostępny w systemie USOS)
  2. Na 23.10.2025 planuję pierwszą kartkówkę. Pytania będą dotyczyły materiału omawianego na zajęciach w dniu 16.10.2025

Materiały:

  1. Powtórzenie: [zadania - algebra] [zadania - prawd. & statystyka] [slajdy] [rozwiązania]

Projekt:

[opis projektu] [przykładowy projekt 1] [przykładowy projekt 2] [przykładowy projekt 3]

Społeczne, Rynek pracy

  • Równość a aspiracje zawodowe kobiet i mężczyzn

    Wspólnie z UN Global Compact Network Poland oddaliśmy w Państwa ręce raport, który podsumowuje pięć lat badań prowadzonych na podstawie danych o kilkudziesięciu milionach firm i kilkuset milionach członków ich władz w Europie na przestrzeni czterech dekad. Próbowaliśmy odpowiedzieć na kilka pytań, na które wcześniej, bez tych wyjątkowych danych, nie dało się znaleźć odpowiedzi.