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

  • 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 2024/25

Kontakt: s.zalas@uw.edu.pl

Konsulatcje: po umówieniu mailowym (online lub osobiście)

Materiały z wykładu: link

 

Kolokwium poprawkowe odbędzie się w piątek 21.02, w sali A002 o godz. 16.45.

Przypominam o przysłaniu projektów do 21.02, w przypadku braku zaliczenia projektu w pierszym terminie.

 

Ocena końcowa:

  1. Kartkówki (5) - 20%
  2. Kolokwium - 40%. T
  3. Praca zaliczeniowa - 40%

Materiały:

  1. Powtórzenie: slajdy   zadania z algebry   zadania z rachunku   rozwiązania
  2. Regresja Liniowa: slajdy zadania  rozwiązania   kody do przykładów z prezentacji
  3. KMRL: slajdy zadania rozwiązania
  4. Testowanie hipotez: slajdy zadania rozwiązania
  5. Błąd zmiennej pominiętej: (slajdy - punkt 3.) zadania rozwiązania

Laboratoria:

  1. Wprowadzenie do R: materiały slajdy
  2. (jak wyżej)
  3. materiały (paczka zawiera rozwiązania do zadania)
  4. Testy/Diagnostyka Modelu - materiały

Projekt:

  1. Opis i zasady (Zaktualizowano 5/12/2024)
  2. Formatka
  3. Przykładowy projekt (Praca została nagordzona w ubiegłym r. a. Udostępniam ją za zgodą autora)

Kolokwium

  1. Zestawy z poprzednich lat: 2023 2024 rozwiązanie2024
  2. Lista zagadnień do powtórzenia - link
  3. Kolokwium styczeń 2025 - rozwiązania