{"type":"script","doc_desc":{"producers":[{"name":"Reproducibility WBG","abbr":"DIME","affiliation":"World Bank - Development Impact Department","role":"Verification and preparation of metadata"}],"prod_date":"2024-04-06","version":"1"},"project_desc":{"authoring_entity":[{"name":"Omoniyi Alimi","email":"oalimi@worldbank.org","affiliation":"World Bank"},{"name":"Wilbert Drazi Vundru","email":"wvundru@worldbank.org","affiliation":"World Bank"},{"name":"Talip Kilic","email":"tkilic@worldbank.org","affiliation":"World Bank"}],"output":[{"type":"Working Paper","description":"Policy Research Working Paper (PRWP) 10698","authors":"Omoniyi Alimi, Wilbert Drazi Vundru, and Talip Kilic","title":"Are Unit Values Reliable Proxies for Prices? Implications of Better Price Data for Household Consumption Measurement in a Low-Income Context","uri":"http:\/\/documents.worldbank.org\/curated\/en\/099523402082423712\/IDU1ca3149d119ea014c5c1a1f7114388f64a05e","doi":"https:\/\/elibrary.worldbank.org\/doi\/abs\/10.1596\/1813-9450-10698"}],"datasets":[{"name":"Malawi Fifth Integrated Household Survey 2019-2020 ","uri":"https:\/\/microdata.worldbank.org\/index.php\/catalog\/3818\/","access_type":"The dataset is public but not included in the package. Data can be downloaded in the data URL.","note":"Source: National Statistical Office (NSO)\nUsers must go to the following link, download the listed files, rename them according to the instructions in the README, and put the files in the correct folder. Please follow the following structure and naming convention. \nLocated at: \"Market Price\/Input files.  Files included IHS_Conversion_Factor_2020.dta, IHS5_VIIRS_monthly.csv, IHS5_VIIRS_monthly.dta, MOD_A.dta, MOD_B.dta, MOD_C.dta, MOD_D.dta. \nLocated at: \"Other inputs\/IHS\" and UV\/Input files, Files: calories.dta, HH_MOD_A_FILT.dta, HH_MOD_B.dta, HH_MOD_C.dta, HH_MOD_D.dta, HH_MOD_E.dta, HH_MOD_F.dta, HH_MOD_F1.dta, HH_MOD_G1.dta, HH_MOD_G2.dta, HH_MOD_G3.dta, HH_MOD_H.dta, HH_MOD_I1.dta, HH_MOD_I2.dta, HH_MOD_J.dta, HH_MOD_K1.dta, HH_MOD_K2.dta, HH_MOD_L.dta, HH_MOD_M.dta, HH_MOD_N1.dta, HH_MOD_N2.dta, HH_MOD_O.dta, HH_MOD_P.dta, HH_MOD_Q.dta, HH_MOD_R.dta, HH_MOD_S1.dta, HH_MOD_S2.dta, HH_MOD_T.dta, HH_MOD_U.dta, HH_MOD_V.dta, HH_MOD_W.dta, HH_MOD_X.dta, IHS_Conversion_Factor_2020.dta, IHS_Conversion_Factor_formerge.dta, IHS_Other_Conversion_Factor_formerge.dta, IHS_Other_Units_2020.dta, Non-food_CPI.xlsx, Non-food_CPI_IHS5.xlsx. Please see the README file for more details. "},{"name":"Markets Survey Data","note":"Source: National Statistical Office (NSO). This information was directly provided as input for this study by the NSO.\nThe Market Survey was implemented alongside the Fifth Integrated Household Survey (IHS5) which is the fifth full survey in the IHS series and was fielded from April 2019 to March 2020 also under the World Bank LSMS-ISA umbrella. The IHS5 is a nationally representative sample survey designed to provide information on the various aspects of household welfare in Malawi. For more information regarding this survey please follow the link below. \nLocated at: Market Price\/Input files and UV\/Input files\/markets_name_main_product.dta, Main_market_product_IDS_NSO.csv","access_type":"Published with package","uri":"https:\/\/microdata.worldbank.org\/index.php\/catalog\/3818\/download\/75852"},{"name":"Market Distance Data","note":"The data files provided are inputs constructed by the authors with distances between all market locations. To replicate these files, interested parties can obtain the coordinates of each market and perform the distance calculations. For convenience, these calculations are also included in our reproducibility package.","access_type":"Published with package"},{"name":"Shape files Malawi","note":"Source: Humanitarian Data Exchange.\nLocated at: Market Price\/Input files and UV\/Input files\/Other Inputs\/shape files","access_type":"Published with package","uri":"https:\/\/data.humdata.org\/dataset\/cod-ab-mwi"}],"software":[{"name":"Stata","version":"18"}],"scripts":[{"file_name":"RR_MWI_2024_82.zip","zip_package":"RR_MWI_2024_82.zip","title":"Reproducibility package (partial data and code) for Are Unit Values Reliable Proxies for Prices? Implications of Better Price Data for Household Consumption Measurement in a Low-Income Context","date":"2024-04","description":"The code in this folder generates the tables and figures in the paper \" Are Unit Values Reliable Proxies for Prices? Implications of Better Price Data for Household Consumption Measurement in a Low-Income Context\" by Omoniyi Alimi, Wilbert Drazi Vundru, and Talip Kilic","dependencies":"All dependencies are stored in the ado folder contained in the reproducibility package.","instructions":"See README in reproducibility package.","notes":"Computational reproducibility verified by Development Impact (DIME) Analytics team, World Bank."}],"title_statement":{"idno":"RR_MWI_2024_82","title":"Reproducibility package for Are Unit Values Reliable Proxies for Prices? Implications of Better Price Data for Household Consumption Measurement in a Low-Income Context","identifiers":[{"type":"DOI","identifier":"10.60572\/98pm-px25"}]},"acknowledgment_statement":"The authors would like to thank (i) Yuri Dikhanov and Giovanni Tonutti for their comments on the earlier draft, (ii) Japan Ministry of Agriculture for providing funding in support of the design and implementation of the Malawi National Market Survey, and (iii) the Malawi National Statistical Office management and survey teams for their dedication and hard work towards the successful implementation of the Malawi Fifth Integrated Household Survey (IHS5) 2019\/20 and the Malawi National Market Survey. The findings, interpretations, and conclusions expressed in this paper are entirely those of the authors. They do not necessarily represent the views of the Government of Malawi, the International Bank for Reconstruction and Development\/World Bank and its affiliated organizations, or those of the Executive Directors of the World Bank or the governments they represent.","production_date":"2024-04","abstract":"Household Consumption and Expenditure Surveys are key to consumption-based monetary poverty measurement. In the absence of market price surveys that are linked to Household Consumption and Expenditure Surveys, unit values are used as proxies for market prices in estimating nominal consumption aggregates, price deflators, poverty lines, and poverty statistics. This practice relies on the Hicksian separability assumption: within-commodity group relative prices are constant across space and the price of a single good is an accurate proxy for the commodity group price. To test, for the first time in a low-income context, whether Hicksian separability holds, this paper uses the price data collected for an extensive list of food items, including several variety\/quality-differentiated products for specific items, in a national market survey that was conducted in Malawi in sync with the Household Consumption and Expenditure Survey that is the source of official poverty statistics. The analysis demonstrates that Hicksian separability fails to hold across space and time and that unit values are biased proxies for prices. Integrating the Household Consumption and Expenditure Survey and market survey data based on location and timing of fieldwork permits an assessment of consumption and poverty estimation based on market prices versus unit values. Relative to unit values, using market prices leads to higher food and overall consumption expenditures \u2013 both in nominal and real terms \u2013 while generating higher poverty lines and higher food and overall poverty rates. Compared to their counterparts based on unit values, spatially-disaggregated poverty estimates based on market prices exhibit a stronger correlation with nightlights \u2013 an objective proxy for living standards.","geographic_units":[{"name":"Malawi","code":"MWI","type":"Country"}],"keywords":[{"name":"Household Consumption"},{"name":"Poverty, Market Surveys"},{"name":"Price Data"},{"name":"Household Surveys"},{"name":"Malawi"},{"name":"Sub-Saharan Africa"}],"topics":[{"vocabulary":"Journal of Economic Literature (JEL)","id":"C81","parent_id":"C8","name":"Methodology for Collecting, Estimating, and Organizing Microeconomic Data \u2022 Data Access"},{"vocabulary":"Journal of Economic Literature (JEL)","uri":"https:\/\/www.aeaweb.org\/econlit\/jelCodes.php?view=jel","id":"I32","parent_id":"I3","name":"Measurement and Analysis of Poverty"}],"language":[{"name":"English","code":"EN"}],"repository_uri":[{"name":"Reproducible Research Repository (World Bank)","uri":"https:\/\/reproducibility.worldbank.org"}],"technology_environment":"Paper exhibits were reproduced in a computer with the following specifications:\n\u2022 OS: Windows 10 Enterprise, version 21H2\n\u2022 Processor: Intel(R) Xeon(R) Gold 6226R CPU @ 2.90GHz, 16 Core(s)\n\u2022 Memory available: 109 GB\n\u2022 Software version: Stata 18","technology_requirements":"~3 hours runtime","reproduction_instructions":"To successfully replicate the analysis provided in this package, new users need to download the necessary data from the Microdata Library. Once downloaded, the data files must be renamed according to the instructions provided in the README file and then placed into the specified folder structure. After that, users must update the directory paths in the main do file to reflect the user's local file system. This main do file is located at Market Price\/0_Do\/OA_Master_ihs5_rep.","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.","license":[{"name":"Modified BSD3","uri":"https:\/\/opensource.org\/license\/bsd-3-clause\/"}],"contacts":[{"name":"Omoniyi Alimi","email":"oalimi@worldbank.org","affiliation":"World Bank"},{"name":"Reproducibility WBG","affiliation":"World Bank","email":"reproducibility@worldbank.org"}],"data_statement":"The dataset utilized in this analysis is publicly available, although not all components are included within the replication package. Specifically, the Malawi Fifth Integrated Household Survey 2019-2020 is accessible via the World Bank Microdata Library. Due to restrictions, this dataset cannot be redistributed in the package.\n\nFor detailed information on accessing this dataset, as well as guidance on the folder structure required to perform the full analysis, please refer to the README file and the data documentation included in this reproducibility package. "},"tags":[{"tag":"DOI"}],"schematype":"script"}