Layoffs and employment changes caused by current economic conditions have significant effects on employee work behavior and emotions as well as organizational outcomes. We examined the relationships between measures of job insecurity, organizational commitment, turnover, absenteeism, and worker performance within a manufacturer in Chapter 11 bankruptcy. A positive relationship was found between job insecurity and intentions to turnover, and a small negative correlation was found between measures of job insecurity and organizational commitment. Unobtrusive observations of union and nonunion performance over 4 months showed that nonunion production workers were on-task more frequently, although on-task behavior was high for both. Productivity and quality measures of different factories favored nonunion locations. Although comparisons between sites were constrained by a quasi-experimental design, repeated behavioral and outcome measures within sites showed differential effects when the company announced a plant closing in another state. Job insecurity appeared to be an establishing operation that produced differential effects between union and nonunion sites as well as among individual employees within sites. (Contains 1 table and 3 figures.)