********** While population-level change has drawn out been a central concern of organizational theory.

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While population-level change has drawn out been a central concern of organizational theory, chiefly theory and research focuses upon the adoption and diffusion of of recent origin practices, with few studies examining in what way organizational practices are eliminated across an organizational population. In particular, there is a paucity of literature in succession deinstitutionalization, the process by which completely entrenched practices give way to recently made known innovations (exceptions include Davis, Diekmann, and Tinsley, 1994; Greve 1995; Kraatz and Zajac, 1996) Neoinstitutionalist theory attends to concentrate on the proces on which new practices become widely disseminated and persist regardless of the economic rationale for them (DiMaggio and Powell, 1983; Scott 1995) Research forward institutionalization often "implies that institutionalization is a once-and-for-all process" (Davis, Diekmann, and Tinsley, 1994: 550) besides processes of both institutionalization and deinstitutionalization drive change: frequently new practices cannot be adopted unles the ancient on es are left behind. A more undivided understanding of organizational and economic change requires us to understand to what extent institutionalized practices erode and make way for the new

Theory and empirical research have begun to illuminate the proces on which organizational practices and conformations are transformed through deinstitutionalization and the closely related processe of abandoning existing practices and adopting fresh illegitimate ones. Recent research highlights the economic, technical, political, and social antecedents of deinstitutionalization and provides evidence that institutionalized practices and compositions are far from stable (Oliver, 1992) Technical and economic crushings for example, lead organizations to adopt practices diametrically oppos to long-held organizational values, as Kraatz and Zajac (1996) rest in their study of the adoption of professional programs from U.S. liberal arts colleges. A changing regulatory environment and the shifting dynamics of power and resources can transform flat the most thoroughly entrenched notions of the corporation and its appropriate form, as evidenced at the wholesale breakup of U business conglomerates from one side takeover, lev eraged buyouts, and investor press (Davis, Diekmann, and Tinsley, 1994) Social processe further hasten deinstitutionalization, as organizations follow information from those around them upon the costs and benefits of abandoning existing practices and adopting recently made known ones (Greve, 1995; Kraatz, 1998) While existing research has begun to address factors that trigger deinstitutionalization, researchers have paid les attention to the specific economic, social, and institutional forces that impede and further it or to how the influence of these forces changes as deinstitutionalization gains moment over time. Given that a practice is institutionalized when it spreads and persists as a end of social factors, above and beyond its technical or economic efficacy (Meyer and Rowan, 1977; DiMaggio and Powell, 1983) deinstitutionalization implies that these social factors in some way lose their grip. But what causes these factors to fall away, and at what route does deinstitutionalization spread by the agency of an organizational field? The fate of permanent occupation during the sluggish Japanese economy of the 1990 provides an eminent case in which to examine this question.

During more than five decades of economic shooting permanent employment became one of the cornerstones of the postwar Japanese economic plan and came to be viewed as a distinctly Japanese way of organizing service (Abegglen, 1958; Dore, 1973; Aoki, 1988) now recession in the 1990s l many executives to believe that permanent office was incompatible with the goals of efficiency and long-term corporate survival, and downsizing among Japanese firms rose to unprecedent on a levels Announcements of risutora (the Japanese transliteration of "restructuring" and a euphemism for downsizing) in the Nihon Keizal Shimbun, Japan's leading business daily, increased from 505 in 1990 to 5324 in 1994 The unemployment rate increased to postwar highs. Layoffs, combined with "voluntary" early retirement programs and reductions of of recent origin hires signified to employees and to society at large that the days of guaranteed vocation from graduation until retirement were numbered.

This paper documents the proces by means of which downsizing became increasingly prevalent in Japan in the 1 990 focusing in succession the effect of both economic and institutional constraining forces on the spread of downsizing among firms. While scholars have documented by what means institutional constraints slow or stop the adoption of modern illegitimate, or divergent practices (Leblebici et al., 1991; Haveman, 1993b; D'Aunno, Succi, and Alexander, 2000) and a large literature traces for what cause new practices diffuse across organizational fields (eg Galaskiewicz and Wasserman, 1989; Davis, 1991; bakes and Wholey, 1993; Haunschild, 1993; Haveman, 1993a), same rarely have these two processe been examined concurrently Although the relative parts of institutional and economic factors in organizational change have been the make submissive of much debate (e.g., Kraatz and Zajac, 1996) organizational researchers are single recently beginning to examine the interaction between social and economic meanings over time in large lakeed data sets (D'Aunno, Succi, and Alexander, 2000)