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. 2012 Aug 16;33:153–165. doi: 10.1016/j.ijhm.2012.07.008

Table 3.

Average abnormal returns (ARs) for food safety events.

Day Abnormal returns (ARs)
t-Statistics p-Value
Mean SD
t−5 .061 2.094 .188 .852
t−4 −.029 2.236 −.084 .934
t−3 .119 2.844 .268 .790
t−2 .133 2.051 .977 .085
t−1 .078 1.637 .085 .400
t0 −1.366 5.711 −1.532 .133
t1 −1.076 2.107 −3.269 .002**
t2 −1.416 3.618 −2.508 .016*
t3 −.101 3.123 −.208 .836
t4 −.498 1.653 −1.928 .061
t5 −.936 3.962 −1.514 .138
t6 .376 4.640 .520 .606
t7 .051 2.539 .129 .898
t8 .081 3.184 .164 .871
t9 −.077 2.099 −.237 .813
t10 −.351 2.166 −1.038 .306

t0, the day when event outbreaks and tn, nth day since the outbreak day (t0).

*

p < .05.

**

p < .01.

***p < .001.