In a study performed by Baron and Neuman,[30] researchers found pay cuts and pay freezes, use of part-time employees, change in management, increased diversity, computer monitoring of employee performance, reengineering, and budget cuts were all significantly linked to increased workplace aggression. The study also showed a substantial amount of evidence linking unpleasant physical conditions (high temperature, poor lighting) and high negative affect, which facilitates workplace aggression.[31] Individuals who resort to mass shootings at work often threaten to kill before any actual violence takes place.[32]