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# CITATION file created with {cffr} R package
# See also: https://docs.ropensci.org/cffr/
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cff-version: 1.2.0
message: 'To cite package "PNADCperiods" in publications use:'
type: software
license: MIT
title: 'PNADCperiods: Identify Reference Periods in Brazil''s PNADC Survey Data'
version: 0.1.2
identifiers:
- type: doi
  value: 10.32614/CRAN.package.PNADCperiods
abstract: 'Identifies reference periods (months, fortnights, and weeks) in Brazil''s
  quarterly PNADC (Pesquisa Nacional por Amostra de Domicilios Continua) survey data
  and computes calibrated weights for sub-quarterly analysis. The core algorithm uses
  IBGE (Instituto Brasileiro de Geografia e Estatistica) ''Parada Tecnica'' (technical
  break) rules combined with respondent birthdates to determine which temporal period
  each survey observation refers to. Period identification follows a nested hierarchy
  enforced by construction: fortnights require months, weeks require fortnights. Achieves
  approximately 97% monthly determination rate with the full series (2012-2025). Strict
  fortnight and week rates are approximately 9% and 3% respectively, as they cannot
  leverage cross-quarter panel aggregation. Experimental strategies (probabilistic
  assignment and UPA (Primary Sampling Unit) aggregation) further improve these determination
  rates. The package provides adaptive hierarchical weight calibration (4/2/1 cell
  levels for month/fortnight/week) with period-specific smoothing to produce survey
  weights calibrated to SIDRA (Sistema IBGE de Recuperacao Automatica) population
  totals. Also includes a SIDRA mensalization module that converts 86+ official rolling
  quarter series from the IBGE SIDRA API (Application Programming Interface) into
  exact monthly estimates, without requiring access to microdata. Hecksher and Barbosa
  (2026) <https://osf.io/preprints/socarxiv/fra5u_v1>.'
authors:
- family-names: Barbosa
  given-names: Rogerio
  email: rogerio.barbosa@iesp.uerj.br
  orcid: https://orcid.org/0000-0002-6796-4547
- family-names: Hecksher
  given-names: Marcos
  email: mdhecksher@gmail.com
  orcid: https://orcid.org/0000-0003-2992-1252
preferred-citation:
  type: manual
  title: 'PNADCperiods: Identify Reference Periods in Brazil''s PNADC Survey Data'
  authors:
  - family-names: Barbosa
    given-names: Rogerio J.
  - family-names: Hecksher
    given-names: Marcos
    email: mdhecksher@gmail.com
    orcid: https://orcid.org/0000-0003-2992-1252
  year: '2026'
  notes: R package version 0.1.2
  url: https://CRAN.R-project.org/package=PNADCperiods
repository: https://antrologos.r-universe.dev
repository-code: https://github.com/antrologos/PNADCperiods
commit: 34d35ba3dfad3d96ae78acffe356b69c8b583bcd
url: https://antrologos.github.io/PNADCperiods/
date-released: '2026-04-27'
contact:
- family-names: Barbosa
  given-names: Rogerio
  email: rogerio.barbosa@iesp.uerj.br
  orcid: https://orcid.org/0000-0002-6796-4547
references:
- type: article
  title: Estimation of exact months for the microdata and rolling quarter series from
    PNAD Continua
  authors:
  - family-names: Hecksher
    given-names: Marcos
  - family-names: Barbosa
    given-names: Rogerio J.
  year: '2026'
  journal: SocArXiv preprint
  url: https://osf.io/preprints/socarxiv/fra5u_v1
- type: report
  title: 'Valor Impreciso por Mes Exato: Microdados e Indicadores Mensais Baseados
    na Pnad Continua'
  authors:
  - family-names: Hecksher
    given-names: Marcos
  year: '2020'
  institution:
    name: IPEA
    address: Brasilia, DF
  issue: '62'
  url: https://portalantigo.ipea.gov.br/portal/index.php?option=com_content&view=article&id=35453
  notes: Earlier formulation of the methodology
- type: report
  title: Cinco meses de perdas de empregos e simulacao de um incentivo a contratacoes
  authors:
  - family-names: Hecksher
    given-names: Marcos
  year: '2020'
  institution:
    name: IPEA
    address: Brasilia, DF
  issue: '87'
  notes: Earlier formulation of the methodology
- type: article
  title: 'Mercado de trabalho: A queda da segunda quinzena de marco, aprofundada em
    abril'
  authors:
  - family-names: Hecksher
    given-names: Marcos
  year: '2020'
  journal: IPEA - Carta de Conjuntura
  volume: '47'
  notes: Earlier formulation of the methodology
  start: 1-6