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PRWP

Reproducibility package for Forcibly Displaced Populations: Lessons from the Experimental and Quasi-Experimental Research, 2010–2026

2026
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Reference ID
RR_WLD_2026_811
Author(s)
Sandra V. Rozo
Collections
World Bank Policy Research Working Papers
Metadata
JSON
Created on
Nov 11, 2026
Last modified
Nov 11, 2026
Page views
20
Downloads
15
  • Project Description
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  • Overview
  • Reproducibility Package
  • Description
  • Scope and coverage
  • Disclaimer
  • Access and rights
  • Contacts
  • Information on metadata
  • Overview

    Abstract

    By the end of 2025, nearly 118 million people were forcibly displaced due to conflict, violence, climate change, and human rights violations. Today, development, humanitarian, and academic institutions agree on the necessity of creating solutions that facilitate the economic self-reliance of these populations. In fact, the UN Refugee Agency has set a target to support 50 percent of the world’s aid reliant refugees in low- and middle-income countries, nearly 8 million people, to move beyond aid through greater self-reliance by 2035. The remaining challenge is to generate evidence on how to do it. This VoxDevLit synthesizes quantitative research conducted between 2010 and 2026, focusing on studies that use experimental or quasi-experimental methods to examine (1) the impacts of forced displacement on host communities and (2) the effectiveness of policies designed to support both forcibly displaced populations and their hosts, with a strong focus on policies that can facilitate refugees’ self-reliance.

    Key insights from this body of work indicate that displaced populations have, on average, neutral to positive effects on economic outcomes, although informal workers and other migrants may initially face challenges, especially if their skills are close substitutes for those of the displaced populations.

    Reproducibility Package

    Scripts
    Readme Get Reproducibility Package
    Link: https://reproducibility.worldbank.org/catalog/699/download/2108/README.pdf
    Reproducibility package for Forcibly Displaced Populations: Lessons from the Experimental and Quasi-Experimental Research, 2010–2026
    File name
    RR_WLD_2026_811
    Zip package
    RR_WLD_2026_811.zip
    Title
    Reproducibility package for Forcibly Displaced Populations: Lessons from the Experimental and Quasi-Experimental Research, 2010–2026
    Date
    2026-11
    Dependencies
    Stata dependencies are listed in the ado folder.
    Instructions
    See README in reproducibility package.
    Notes
    Computational reproducibility verified by Development Impact (DECDI) Analytics team, World Bank.
    Source code repository
    Repository name URI
    Reproducible Research Repository (World Bank) https://reproducibility.worldbank.org
    Software
    Stata
    Name
    Stata
    Version
    18.0 MP

    Reproducibility

    Technology environment

    Paper exhibits were reproduced on a computer with the following specifications:
    • OS: macOS 26.7.1
    • Processor: Apple M4 Pro (14 cores)
    • Memory available: 24 GB

    Technology requirements

    Runtime: ~15 seconds.

    Reproduction instructions

    To reproduce the findings in this paper, a replicator must:

    1. Open the main do-file in the Reproducibility package/ folder and set global root (line 18) to the location of that folder on your computer.
    2. Run the main do-file in Stata 18.

    Data

    Datasets
    Refugee Data Finder
    Name
    Refugee Data Finder
    Note
    Filename: Data/Raw/UNHCR/unhcr_population.zip; Data/Raw/UNHCR/unrwa.json; Data/Raw/UNHCR/countries.json. Downloaded from the UNHCR Refugee Data Finder API on 20 October 2026. unhcr_population.zip (population.csv and footnotes.csv) has the end-of-year numbers of refugees, asylum-seekers, internally displaced people, and others of concern by country of origin, country of asylum, and year, 1951–2025; unrwa.json has the number of Palestine refugees under UNRWA's mandate by year, 1951–2025; countries.json is UNHCR's country list with ISO codes and continents.
    Access policy
    Data is publicly available and included in the reproducibility package.
    License
    Creative Commons Attribution 4.0 International (CC BY 4.0)
    License URL
    https://www.unhcr.org/refugee-statistics/methodology
    Data URL
    https://www.unhcr.org/refugee-statistics/download
    Citation
    United Nations High Commissioner for Refugees (UNHCR). (2026). Refugee Data Finder [dataset]. UNHCR. Accessed 2026-10-20. https://www.unhcr.org/refugee-statistics
    World Development Indicators
    Name
    World Development Indicators
    Note
    Filename: Data/Raw/WorldBank/world_pop.dta. Total world population by year (indicator SP.POP.TOTL, world aggregate WLD), 1960–2025, retrieved on 20 October 2026 in Stata with wbopendata and kept as year and sp_pop_totl. Read by Code/02_figure1.do to express forcibly displaced people per 1,000 people in Figure 1, Panel A.
    Access policy
    Data is publicly available and included in the reproducibility package.
    License
    Creative Commons Attribution 4.0 International (CC BY 4.0)
    License URL
    https://datacatalog.worldbank.org/public-licenses#cc-by
    Data URL
    https://data.worldbank.org/indicator/SP.POP.TOTL
    Citation
    World Bank. (2026). World Development Indicators: Population, total (SP.POP.TOTL) [dataset]. World Bank. Accessed 2026-10-20. https://data.worldbank.org/indicator/SP.POP.TOTL
    Dataset of World Refugee and Asylum Policies (DWRAP)
    Name
    Dataset of World Refugee and Asylum Policies (DWRAP)
    Note
    Filename: Data/Raw/DWRAP/dwrap_index.dta. File version of 28 June 2024, accessed 11 December 2024. Asylum policy indices (aggregate, access, services, livelihoods, movement and political participation) by country and year, 1951–2022, based on Blair, Grossman and Weinstein (2022). Read by Code/03_figure2_appendixB.do for Figure 2 and Figures B1–B5 (derived: Data/Intermediate/dwrap_continent_year.dta, FigureB_PanelB_MapData.dta and Outputs/MapData/FigureB_PanelB_MapData.csv, the data of the official maps in Figures B1–B5, Panel B). Continents and ISO3 codes of DWRAP countries are assigned in Code/dwrap_countries.do.
    Access policy
    Data is publicly available and included in the reproducibility package.
    License
    Creative Commons Attribution 4.0 International (CC BY 4.0)
    License URL
    https://datacatalog.worldbank.org/public-licenses#cc-by
    Data URL
    https://datacatalog.worldbank.org/search/dataset/0066171/Dataset-of-World-Refugee-and-Asylum-Policies--DWRAP-
    Citation
    World Bank. (2024). Dataset of World Refugee and Asylum Policies (DWRAP) [dataset]. World Bank Development Data Hub, dataset 0066171. https://datacatalog.worldbank.org/search/dataset/0066171/Dataset-of-World-Refugee-and-Asylum-Policies--DWRAP-
    1:110m Cultural Vectors, Admin 0 – Countries, version 5.1.1
    Name
    1:110m Cultural Vectors, Admin 0 – Countries, version 5.1.1
    Note
    Filename: Data/Raw/Shapefiles/NaturalEarth/ne_110m_admin_0_countries.shp; .shx; .dbf; .prj; .cpg; .README.html; .VERSION.txt. Public-domain country boundaries, accessed 20 October 2026.
    Access policy
    Data is publicly available and included in the reproducibility package.
    License
    Public domain
    License URL
    https://www.naturalearthdata.com/about/terms-of-use/
    Data URL
    https://www.naturalearthdata.com/downloads/110m-cultural-vectors/
    Citation
    Natural Earth. (2022). 1:110m Cultural Vectors, Admin 0 – Countries, version 5.1.1 [dataset]. Natural Earth. Accessed 2026-10-20. https://www.naturalearthdata.com/downloads/110m-cultural-vectors/
    Database of experimental and quasi-experimental studies on forced displacement, 2010–2026
    Name
    Database of experimental and quasi-experimental studies on forced displacement, 2010–2026
    Note
    Filename: Data/Raw/Literature/LitReview_2010-2026.xlsx. Original data constructed by the author and research assistants from the published and working-paper literature (search strategy in Appendix A of the paper): the 312 experimental and quasi-experimental studies reviewed, with authors, year, journal, method, up to three topics, and the population studied (tab Summarized), and the topic definitions (tab Index).
    Access policy
    Data is included in the reproducibility package.
    License
    Custom License
    Citation
    Authors' compilation, World Bank. (2026). Database of experimental and quasi-experimental studies on forced displacement, 2010–2026 [dataset].
    Data statement

    The reproducibility package relies on one type of data: open data. For the source, access type, file location, and citation of each dataset, refer to the Datasets section and the README file.

    Description

    Output
    Forcibly Displaced Populations: Lessons from the Experimental and Quasi-Experimental Research, 2010–2026
    Type
    Working Paper
    Title
    Forcibly Displaced Populations: Lessons from the Experimental and Quasi-Experimental Research, 2010–2026
    Description
    Policy Research Working Paper (PRWP)
    Authors
    Author Affiliation Email
    Sandra V. Rozo World Bank Group sandrarozo@worldbank.org
    Date of production

    2026-11-09

    Scope and coverage

    Geographic locations
    Location Code
    World WLD
    Keywords
    Forced Displacement Refugees Internally Displaced Persons Host Communities Self-Reliance Impact Evaluation Literature Review
    Topics
    ID Topic Parent topic ID Vocabulary Vocabulary URI
    D74 Conflict • Conflict Resolution • Alliances • Revolutions D7 Journal of Economic Literature (JEL)
    F22 International Migration F2 Journal of Economic Literature (JEL)
    I38 Government Policy • Provision and Effects of Welfare Programs I3 Journal of Economic Literature (JEL)
    J15 Economics of Minorities, Races, Indigenous Peoples, and Immigrants • Non-labor Discrimination J1 Journal of Economic Literature (JEL)
    J61 Geographic Labor Mobility • Immigrant Workers J6 Journal of Economic Literature (JEL)
    O15 Human Resources • Human Development • Income Distribution • Migration O1 Journal of Economic Literature (JEL)

    Disclaimer

    Disclaimer

    The materials in the reproducibility packages are distributed as they were prepared by the staff of the International Bank for Reconstruction and Development/The World Bank. The findings, interpretations, and conclusions expressed in this event do not necessarily reflect the views of the World Bank, the Executive Directors of the World Bank, or the governments they represent. The World Bank does not guarantee the accuracy of the materials included in the reproducibility package.

    Access and rights

    License
    Name URI
    MIT License https://opensource.org/license/mit
    World Bank IGO Rider https://github.com/worldbank/metadata-editor/blob/main/WB-IGO-RIDER.md

    Contacts

    Contacts
    Name Affiliation Email
    Sandra V. Rozo World Bank Group sandrarozo@worldbank.org
    Reproducibility World Bank Group World Bank Group reproducibility@worldbank.org

    Information on metadata

    Producers
    Name Abbreviation Affiliation Role
    Reproducibility WBG DECDI World Bank - Development Impact Department Verification and preparation of metadata
    Date of Production

    2026-11-09

    Document version

    1

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