test IS is more active after events that signal strength, or that people are more aware of their actions after those events.

[yulinHAO1995]

Put observations in three categories. Category 1: Before the event, Category 2: during the event t until one day later, Category 3: More than one day after the event. Then run y = ß1 Category1+ ß2Category3, with the event time itself as a reference category.

results can be found in stata/tables called "reg_IS tech before and after certain event"