These very loosely organized files appear to have been assembled, mostly in black binders, by de Tray for his personal use. Files (binders) were created for a 1985 mission to Jamaica he participated in to evaluate the effects of structural adjustment activities on major sectors of the Jamaican economy and a 1986 mission to Grenada he also participated in to meet with government officials in the national statistical office to discuss government survey needs and the possibility of monitoring a Living Standards Study. These files include copies of Back-to-Office Reports (BTOs) and other correspondence relating to the mission.

De Tray's Ivory Coast Living Standards Survey (ICLSS) materials, which consist mostly of technical data from the survey (1985-1987), include a Terms of Reference (TOR) and BTO for a 1983 project identification/preparation mission to Abidjan, Paris, and London for the ICLSS. A small number of reports, sampling plans, and prototype questions for the ICLSS are included for the 1983 - 1984 period. Correspondence concerning the French version of the ICLSS questionnaire, recommendations for questionnaire changes, and a report of a mission by a DRDLS staff member to Cote d'Ivoire to collect data from the ICLSS are included for the 1986-1987 period. De Tray also created a file for a 1985-1986 Bank study (RPO 673-84) (folder 1315128) of the determinants of children's nutritional status and morbidity in the Cote d'Ivoire for which he was principal supervisor.

De Tray's Ghana Living Standards Survey (GLSS) materials include his BTO from a February - March 1986 Technical Assistance mission to Ghana and Cote d'Ivoire to explore the possibility of undertaking a GLSS and to discuss a proposed seminar covering results from the 1985 ICLSS and an earlier 1979 consumption survey. Also included are other 1986-1987 BTO reports from missions relating to the GLSS including a September 17, 1986 report of a mission to Ghana de Tray participated in to finalize plans for the GLSS. Also included is correspondence with and mission reports from a consultant working on the GLSS.

A smaller amount of material is included for the Peruvian Living Standards Survey. BTO reports (1984) from missions to Peru to prepare for the survey and a proposal for a study of Education and Informal Sector Employment (1983) are among the documents assembled. The series also includes an undated draft proposal for an Egyptian Living Standards Survey, a December 5, 1983 BTO from a mission to that country to discuss the conduct of a Living Standards Survey, and some related material. De Tray also assembled some publications and other materials that appear to have related to his membership on the Task Force on the Annual Report on Bank Research. Found with this material is a copy of a paper he prepared in October 1984 entitled The Living Standards Measurement Survey which describes in detail the origin of LSMS at the Bank, the development of the survey design, planned analyses of data collected, and the survey plan for the Ivory Coast where the first LSMS was to take place.