Prob 1.1
Prob1.2
the sudden increase happened at the September 2001 and January 2002.
Prob1.3
- September 17 Jeffrey Skilling sells 500,000 Enron shares.
- September 21 Director Robert Belfer sells 109,000 Enron shares.
- September 26 Lay tells employees that Enron’s accounting practices are “legal and totally appropriate,” that Enron stock is “an incredible bargain,” that he and other executives have bought Enron stock in the last two months, and that “the third quarter is looking great” in an online forum.
- January 9 The U.S. Justice Department confirms reports that it has begun a criminal investigation into Enron’s bankruptcy.
- January 10 Arthur Andersen states that it destroyed Enron documents. Congressional investigators state the destruction occurred from September to November.
- January 14 Arthur Andersen releases communications documents detailing Nancy Temple’s involvement in the document destruction.
- January 15 Arthur Andersen announces that it fired David B. Duncan and put three partners on administrative leave.
- January 20 On Meet the Press, Arthur Andersen CEO Joseph Berardino states the document retention policy was “not to shred documents, not to eliminate documents if you have a reasonable basis to anticipate investigation.”
- from http://en.wikipedia.org/wiki/Timeline_of_the_Enron_scandal
Prob1.4
Prob 1.5
we could analyze the seasonal average data.
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