11.   Yet when crime rates rise, the police buy more squad cars.

12.   If your income rises above a certain threshold, your tax rate also rises.

13.   If you fine an oil-spilling company ten times the value of the spilt oil, its insurance rates merely rise.

14.   The real wage rate obviously rises as a result of an expansion of output over this range.

15.   If the real wage rate has temporarily risen, as workers are supposed to believe, employers will have the incentive to take on fewer workers.

16.   Potential purchasers of these securities will probably wait until their prices fall and the rate of interest rises.

17.   The inflation rate has risen to one point seven per cent.

18.   However, The Chancellor insists that the rate will rise again if there is any threat to keeping inflation low.

19.   The murder rate would undoubtedly rise.

20.   So the profit rate rose faster than the share.