3BABER W R, FAIRFIELD P M, HAGGARD J A. The effect of concern about reported income on discretionary spending decisions: the case of research and development [J]. The Accounting review,1991,66(4) :818-829.
4PERRY S, GRINAKER R. Earnings expectations and dis cretionary research and development spending[J]. Account-ing Horizons,1994,8(4)=43-51.
5MARKARIAN G, POZZA L, PRENCIPE A. Capitalization of R.D costs and earnings management: Evidence from I- talian listed companies [J]. International Journal of Ac-counting, 2008,43 ( 3 ) : 246-267.
6AMIR E, LEV B. Value relevance of nonfinancial informa-tion: the wireless communications industry[J]. Accounting and Economics,1996(22) .3 30.
7ABOODY L,LEV B. The value relevance of intangibles: the case of software capitalization[J]. Accounting Research, 1998(36):161-191.
8LEV B, SOUGIANNIS T. The capitalization, amortization, and value-relevance of RND[J]. Accounting and Eeonom ics ,1996,21(1).107 138.
9BARTH M E, CLINCH G. Revalued financial, tangible, and intangible assets: associations with share prices and non market based value estimates [J]. Accounting Research, 1998,36(3) =199-233.
10AHMED K,FALK H. The value relevance of management's research and development reporting choice; evidence from australia[J]. Accounting and Public Policy, 2006,25 (3) :231-264.