Its consumption expenditure and price data is used by McKelvey (2011) to check the validity of unit value as a proxy for price.
The paneL data on farm labor demand and household composition is used by Lafave and Thomas (2016) to test the neoclassical agricultural household model.
"After a listing survey in late 2001, a population-representative sample of households living in Purworejo kabupaten were interviewed every four months beginning in 2002 and continuing through 2005. A longer-term follow-up was conducted five years after the start of the survey in 2007." (Lafave and Thomas (2016), p. 1926)See section 4 of Lafave and Thomas (2016) for more detail, including data quality issues.