1.   The length of stay and conditions have been cited as key factors behind a recent surge in violence, escapes and riots.

2.   An upsurge in anti-Semitism, attributed in some quarters to the worsening economic situation, was a significant factor behind the emigration of Soviet Jews currently in record numbers.

3.   This, coupled with growth in the overall market, has been a major factor behind the increase in profit for the division as a whole.

4.   The globalisation of the market and the absence of regulatory restraints are among the factors behind this tendency.

5.   We assess the factors behind the development of the markets, highlighting the importance of the regulatory environment and investor preferences.

6.   Despite the complex set of influences, we would emphasize the high rate of accumulation as the most fundamental factor behind the decline in profitability.

7.   An aging infrastructure of transmission lines, gas pipelines and generating plants is the major factor behind skyrocketing electricity prices in California, industry officials say.

8.   An aging infrastructure of transmission lines, gas pipelines and generating plants is the major factor behind skyrocketing electricity prices in California, they say.

9.   Analysts said there was no single factor behind the weakness in the mainframe market.

10.   Another possible factor behind the rise, scientists add, is simply more reporting of attacks, with the accounts increasing faster than actual incidents.