WAR BORROWING 162 debtedness has brought about inflation — it is worth while to refer to the current unsettlement of opinion as to what constitutes inflation. During the past two years there has raged in English financial circles, ­ technical and academic, a controversy recalling in variety and intensity the classic bullion debate of a century ago, not only as to whether inflation really existed in England, whether it was imputable wholly or in any part to public borrowing and whether this consequence if existent was avoidable or inevitable — but more fundamentally as to what inflation really is. Seemingly driven to scientific desperation by the variety of current meanings attaching ­ to the word, an English economist of note has lately declared 3 “ there is obviously much to be said for abandoning the term inflation altogether, and so dispensing with the need for any definition.” Similarly in this country. The old fixity of concept ­ and definition has perceptibly yielded, more conspicuously indeed among practical financiers and financial administrators than among academic economists. ­ In banking circles there is disposition to view the matter as essentially one of banking solvency, and to maintain that 4 “ the test of inflation ­ in the credit structure is the relation of cash holdings to deposits.” So too it is perhaps not without significance that in the annual report 5 of the Federal Reserve Board the term “ expansion ” has 3 Pigou, “ Inflation ” in The Economic Journal, December, 1917, p. 490- . , 4 “ Is There Credit Inflation in the United States? ”, circular letter of Guaranty Trust Company of New York, March 4, 1918. 5 January 15, 1918.