To answer the question, "did ICT firms behave very differently from non-ICT firms during the global ICT boom-bust cycle on the stock markets?," the authors analyze the financial behavior of a sample of North-American and Western European firms during 1991-2002.
Link
http://econpapers.repec.org/scripts/redir.pl?u=http%3A%2F%2Fwww.dnb.nl%2Fdnb%2Fbin%2Fdoc%2FWorking%2520Paper%2520No.%252077-2005_tcm13-67856.pdf;h=repec:dnb:dnbwpp:077