Last month BHP Billiton, a rival mining firm, withdrew a stock bid for Rio, saying its debts and the difficulty of making disposals raised risks to an "unacceptable level".Such concerns are mirrored in the prices of credit-default swaps (CDSs), a type of insurance against bankruptcy, which have risen to alarming levels for all six firms (see chart).
As we conducted a large number of comparisons in this analysis, one might expect some significantly reduced or raised risks to occur by chance alone.
That this also raises risks to the financial system is a trade-off the Fed seems prepared to live with.
It's clear there's more research to be done, but also seems fairly evident that proper procedures can lure sharks, when necessary, without raising risks to surfers and others eager to enjoy ocean waters in regions also frequented by this remarkable predator.
Although risks of ovarian cancer were not related to non-tamoxifen hormonal treatments for breast cancer or to radiotherapy, there was a significantly raised risk in relation to chemotherapy.
There was, however, a significantly raised risk in relation to non-hormonal chemotherapy.
Crude infection frequencies (Asian origin 35%; white 39%; black 45%) are consistent with sexual behaviour data and suggest that the raised risk may be limited to black women.
13 Increased experience, especially among doctors with more than 20 years' experience in practice, 24 might also be associated with a raised risk of inpatient death related to medical care.
Furthermore, there were no significantly raised risks in relation to number of years of use, time since first use, cumulative hours of use or cumulative number of calls, or separately for analogue or digital phones.
First, the results pointed towards the need to raise risk awareness in less conventional locations situated close to the tracks, to educate urban planners and community representatives, and to combine education campaigns with punitive measures.
