本研究透過文字探勘對美國企業2004年至2014年的MD&A資訊進行分析，並搭配財務資訊相互比較，分析美國企業所揭露的MD&A語調一致性，接著透過實證研究分析造成美國企業MD&A語調一致性結果的原因。MD&A非量化資訊運用Loughran and McDonald正負向詞典、TFIDF、K-Means等技術進行分析，並結合財務資訊分析，分析美國企業2004年至2014年的MD&A資訊；再利用企業績效變異度、企業規模與企業成立年數等變數，來分析影響公司MD&A揭露誇大與否的因素。
研究結果顯示，企業規模、企業風險程度、分析師追蹤人數與企業成立年
數皆會深深影響MD&A語調的一致性。除了主要實證分析結果外，另外搭配三組穩健性測試來測試模型的敏感性。本研究希望讓資訊使用者運用企業所揭露的MD&A資訊時，能做更多適當的調整，考慮公司MD&A的揭露是否有過度樂觀誇大或是過度悲觀的情勢，並且可以藉此做出正確的經濟決策。

This study presented a way to analyze the MD&A information of US listed companies from 2004 to 2014 via text mining techniques such as Loughran and McDonald Word Count and TFIDF. Then I cross compare a company’s MD&A information with its financial information using K-Means and establish an index to capture the consistency between the two types of information. Finally, I develop empirical model with explanatory variables such as volatility of earnings, company scale, company’s age, etc. for the consistency index.
According to the empirical results, company scale, company operating risks, analyst coverage, and company’s age are significantly related to the MD&A consistency. Three robustness checks demonstrate the similar results. The results suggest investors an additional way of using MD&A other than merely reading it. Investors should consider whether the MD&A is overstated or understated while using it in their investment decisions.

邱逸紅，2011，“管理層討論和分析”信息質量特徵體系構建，財會月
刊，第11期（6月）：18-20。
Abrahamson, E. and E. Amir. 1996. The information content
of the president ‘s letter to shareholders. Journal of
Business Finance and Accounting 23(8): 1157-1182.
Amir, E. and B. Lev. 1996. Value relevance of
nonfinancial information: The wireless
telecommunications industry. Journal of Accounting and
Economics 22(1-3): 3-30.
Antweiler, W., and M. Z. Frank. 2004. Is all that talk
just noise? The information content of internet stock
message boards. The Journal of Finance 59(3):
1259-1294.
Arnold V., J. C. Bedard, J. R. Phillips, and S. G.
Sutton. 2012. The impact of information tagging in the
MD&A on investor decision making: Implications for
XBRL. International Journal of Accounting Information
Systems (January): 2-20.
Back, B., J. Toivonen, H. Vanharanta, and A. Visa. 2001.
Comparing numerical data and text information from
annual reports using self-organizing maps.Accounting
Information Systems：249-269.
Brown, S. V., and J. W. Tucker. 2011. Large-Sample
Evidence on Firms’ Year-over-Year MD&A Modifications.
Journal of Accounting Research 49(2): 309-346.
Bryan, S. H. 1997. Incremental information content of
required disclosures contained in management
discussion and analysis. The Accounting Review 72 (2):
285-301.
Clarkson, P. M., J. Kao, and G. D. Richardson. 1994. The
Voluntary Inclusion of Forecasts in the MD&A Section
of Annual Reports. Contemporary Accounting Research
11(1): 423-450.
Cole, C. and Jones C. L. 2004. The Usefulness of MD&A
Disclosures in the Retail Industry. Journal of
Accounting, Auditing ,and Finance 19: 361-388.
Ernstberger, J. and G. Michael. 2013. How do firm- and
country-level governance mechanisms affect firms’
disclosure? Journal of Accounting Public Policy 32(3):
50-67.
Forker, J. J.1992. Corporate governance and disclosure
quality. Accounting and Business Research, Vol. 22,
No. 86: 111-124.
Frazier, K. B., R. W. Ingram, and B. M. Tennyson.1984. A
Methodology for the Analysis of Narrative Accounting
Disclosures. Journal of Accounting Research 22(1):
318-331.
Healy, P. M. and K. G. Palepu. 2001. Information
asymmetry, corporate disclosure, and the capital
markets A review of the empirical disclosure
literature. Journal of Accounting and Economics
31(1-3): 405-440.
Hildebrandt, H. W. and R. D. Snyder. 1981. The pollyanna
hypothesis in business writing: Initial results,
suggestions for research. Journal of Business
Communication 18(1): 5-15.
Li, F. 2010. The information content of forward-looking
statements incorporate filings - A naïve Bayesian
learning approach. Journal of Accounting Research
48(5): 1049–1102.
Naser, k. 1998. Comprehensive of disclosure of non-
financial companies listed on the Amman financial
market. International Journal of Commerce and
management vol2(8):pp.88-119.
Petersen, M. A. 2004. Information : hard and soft.
Northwestern University. Unpublished.
Previts, G., R. Bricker, T. Robinson and S. Young. 1994.
A Content Analysis of Sell-Side Financial Analyst
Company Reports. Accounting Horizons 8(2): 55-70.
Qiu, X. Y., P. Srinivasan and N. Street. 2006. Exploring
the forecasting potential of company annual reports.
Proceedings of the American Society for Information
Science and Technology 43(1)：1-15
Rogers, J. L. and A. V. Buskirk. 2009. Shareholder
litigation and changes in disclosure behavior. Journal
of Accounting and Economics 47(1-2): 136-156.
Rogers, R., and J. Grant. 1997. Content analysis of
information cited in reports of sell-side financial
analysts. Journal of Financial Statement Analysis
3(1): 17-30.
Schipper, K. 1991. Commentary on analysts' forecasts.
Accounting Horizons 5:105-121.
Schroeder, N. and C. Gibson. 1990. Readabilities of
management’s discussion and analysis. Accounting
Horizons (Dec.): 78-87.
Sullivan, D. 2001. Document Warehousing and Text Mining:
Techniques for Improving Business Operations,
Marketing, and Sales.
Visa, A., J. Toivonen, P. Ruokonen, H. Vanharanta, and B.
Back. 2000. Knowledge discovery from text documents
based on paragraph maps. Proceedings of the 33rd
Hawaii International Conference on System Sciences -
2000.
Zhou, L. 2007. Ontology learning: State of the art and
open issues. Information Technology and Management8
(3): 241-252.