Application of Newcomb-Benford law to aid fraud detection
DOI:
https://doi.org/10.33448/rsd-v9i8.5276Keywords:
Newcomb-Benford; Accounting model; Z-test; x2 -Test.Abstract
The Newcomb-Benford law states that the expected frequencies for the first digits of values that make up certain data sets do not follow a uniform distribution. Satisfied the assumptions of the Newcomb-Benford law, the probability of occurrence of digits 1 to 9 is decreasing, being equal to 30.1% for digit 1, 17.6% for digit 2 and only 4.6% for digit 9, for example. In this article, the Newcomb-Benford law is presented as a possible tool to be used in the field of accounting auditing. The accounting model used is based on relationship between the Newcomb-Benford law and the statistical hypothesis tests: Test-Z and x2-Test. In a practical application, 589 values of commitment grades from the Military Academy of Agulhas Negras were analyzed from January 1, 2017 to June 30, 2017. It was concluded that the data presented conformity with the proposed model in relation to leading digits of the analyzed values and that the accounting model can be used by auditors to detect accounting deviations.
References
Carslaw, C. A. P. (1988). Anomalies in income numbers: evidence of goal-oriented behavior, The Accounting Review, 63(2), 321-327.
Christian, C. W., Gupta, S. (1993). New evidence on “secondary evasion". The Journal of the
American Taxation Association, American Accounting Association, 15(1), 72.
Corrar, L., Paulo, E., Dias Filho, J. M., & Rodrigues, A. (2011). Análise multivariada para os cursos de administração, ciências contábeis e economia. São Paulo: Atlas.
Corrar, L., & Theóphilo, C. R. (2004). Pesquisa operacional para decisão em contabilidade e administração: contabilometria. São Paulo: Atlas.
Diekmann, A. (2007). Not the First Digit! Using Benford's Law to Detect Fraudulent Scientific Data, Journal of Applied Statistics, 34:3, 321-329, DOI: 10.1080/02664760601004940
Durtschi, C., Hillison, W., Pacini, C. (2004). The Effective Use of Benford’s Law to Assist in Detecting Fraud in Accounting Data. Journal of Forensic Accounting, v. 99, n. 99, p. 17–34.
Ettredge, M. L., Srivastaval, R. P. (1999). Using digital analysis to enhance data integrity. Issues in Accounting Education, 14(4), 354–363.
Figueiredo, S., Moura, H. (2001). A utilização dos Métodos Quantitativos pela Contabilidade. Revista Brasileira de Contabilidade, Brasília, ano 30, 127, 51-61.
Nigrini, M. J. (1999). I’ve got your number. Journal of Accountancy, 187(5), 79–83.
Nigrini, M. J., Miller, S. J. (2007). Benford’s Law Applied to Hydrology Data – Results and Revelance to Other Geophysical Data. Mathematical Geology, 39(5), 469–490.
Nossa, V. (1999). A necessidade de professores qualificados e atualizados para o ensino da Contabilidade. Revista de Contabilidade do CRC-SP, n. 9.
Nye, J., Moul, C. (2007). The Political Economy of Numbers: On the Application of Benford’s Law to International Macroeconomic Statistics. The B.E. Journal of Macroeconomics, 7(1).
Sambridge, M., Tkalčić, H., Jackson, A. (2010). Benford’s law in the natural sciences. Geophysical Research Letters, 379(22), 1–5.
Santos, J., Diniz, J. A., Filho, J. F. R. (2003). A lei de newcomb-benford: uma aplicação para determinar o dna-equivalente das despesas no setor público. Anais do Seminário USP de Contabilidade e Controladoria, v. 3.
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