Dissimilar newcomers are unlikely to receive social support, so a firm initiated program may be the only way to ensure that mentoring relationships are established. Peer support was the strongest influence on expatriate adjustment, and supervisor support is not significant. Language training, local mentoring, customs and roles, stress and adjustment training, career and adjustment training, career assessment, national or regional orientation, and business issues. During the assignment, support may involve a wide range of formal and informal activities. The development of communication channels is crucial.
Pre-departure - The organization should provide language briefing, introduction
and overview, national or orientation, business issues, personal and family orientation, customs and roles, career management, and visiting in the host country for the expatriate and family. For on-site phrase, the company should provide local mentoring, stress and adjustment training, language training, career assessment, business issues and other activities support both formal and informal pattern.
Repatriation - The organization should provide the course for life after repatriation, fringe benefit, financial management, re-entry shock, options and plans
I was thinking you are on to research in that area of EXPATRIATES, i have done one intervention for a leading IT organizations' EXPATRIATE'S Leadership transition in 2004.
As this is an interesting area and in the evolution of global work place, it would be better if you can describe the intend of your study.