The ceiling on Treasury bills issues  By law Treasury bills are an instrument for carrying out monetary policy, but we cannot fully use them for this purpose because the creator of the tool also limited its quantity. In other words: Yes, you have an inflation target. You want tools for the job? Improvise!
Mathematical concepts like measurement, which were applicable earlier only to physical sciences, are now being made use of in social as well as biological sciences too. 10. Turning to more formal discussion, one of the important features of a scientific investigation is its fixation with putting numbers to things, by quantification using mathematical formulae.