Changes in version 0.1.0                        

New features

  - IHS(): Download IHS microdata by variable name, round, and module.
  - IHS_survey(): Return survey-design objects for weighted analysis.
  - ihs_auth(): One-time API key setup with interactive browser-based
    guide.
  - ihs_search(): Search variable names and labels across rounds via the
    crosswalk.
  - ihs_variables(): Browse all variables in a round via the live NADA
    API.
  - ihs_label(): Retrieve Stata variable labels from the crosswalk or
    NADA.
  - ihs_modules(): List available data modules per round.
  - ihs_crosswalk_check(): Assess cross-round variable comparability.
  - ihs_cache_info() and ihs_cache_clear(): Manage local data cache.
  - mwi_surveys(): Overview of supported and planned Malawi surveys.

Supported surveys

  - IHS2 (2004/05) through IHS5 (2019/20) are fully supported via the
    API.
  - IHS1 (1997/98) is not yet available via the World Bank Microdata
    Library.

Data access

  - All data downloaded directly from the World Bank Microdata Library.
    A free account and API key are required. See ?ihs_auth.