El incremento patrimonial justificado ocurre cuando el valor del patrimonio de un contribuyente aumenta, sin que este pueda acreditar fehacientemente su causa o la fuente que lo originó, el presente trabajo de investigación tiene como principal objetivo determinar el impacto del incremento patrimonial no justificado en la fiscalización tributaria a los ingenieros civiles de Lima Metropolitana, año 2020. Para ello, se realizó una investigación de metodología mixta (exploratoria y descriptiva) no experimental de corte transversal con un enfoque mixto. Dentro de esta, se detalla los siguientes puntos, el marco teórico en el cual se expone los principales antecedentes de la investigación, así como las consideraciones del tema en cuestión y el plan de investigación, en donde se identifica el problema principal y específicos, objetivos e hipótesis. En los capítulos consecutivos, se explica la metodología de la investigación y diseño de la presente investigación; asimismo, se determina los instrumentos de recolección de datos a utilizar, así como el tamaño de la población y el cálculo de la muestra, el desarrollo de la investigación y la aplicación de los instrumentos mediante las entrevistas a profundidad y las encuestas realizadas mediante un cuestionario y el caso práctico, por ende, se presenta los resultados obtenidos de la ejecución de los instrumentos de recolección de datos, además de la medición de la fiabilidad con el indicador del alfa de conbrach. Finalmente, se detallan las conclusiones y recomendaciones obtenidas tras la realización de la investigación. / The justified equity increase occurs when the value of a taxpayer's equity increases, without being able to reliably prove its cause or the source that originated it, the main objective of this research work is to determine the impact of the unjustified equity increase in the audit. tax to the civil engineers of Metropolitan Lima, year 2020. For this, a non-experimental cross-sectional mixed methodology (exploratory and descriptive) investigation was carried out with a mixed approach. Within this, the following points are detailed, the theoretical framework in which the main background of the research is exposed, as well as the considerations of the subject in question and the research plan, where the main problem and specific objectives are identified. and hypotheses. In the consecutive chapters, the research methodology and design of this research is explained; Likewise, the data collection instruments to be used are determined, as well as the size of the population and the calculation of the sample, the development of the research and the application of the instruments through in-depth interviews and surveys carried out using a questionnaire. and the practical case, therefore, presents the results obtained from the execution of the data collection instruments, in addition to the reliability measurement with the conbrach alpha indicator. Finally, the conclusions and recommendations obtained after conducting the research are detailed. / Tesis

Indiana University-Purdue University Indianapolis (IUPUI) / Accurate estimation of alcohol price elasticity is important for policy analysis – e.g.., determining optimal taxes and projecting revenues generated from proposed tax changes. Several approaches to specifying and estimating the price elasticity of demand for alcohol can be found in the literature. There are two keys to policy-relevant specification and estimation of alcohol price elasticity. First, the underlying demand model should take account of alcohol consumption decisions at the extensive margin – i.e., individuals' decisions to drink or not – because the price of alcohol may impact the drinking initiation decision and one's decision to drink is likely to be structurally different from how much they drink if they decide to do so (the intensive margin). Secondly, the modeling of alcohol demand elasticity should yield both theoretical and empirical results that are causally interpretable. The elasticity estimates obtained from the existing two-part model takes into account the extensive margin, but are not causally interpretable. The elasticity estimates obtained using aggregate-level models, however, are causally interpretable, but do not explicitly take into account the extensive margin. There currently exists no specification and estimation method for alcohol price elasticity that both accommodates the extensive margin and is causally interpretable. I explore additional sources of bias in the extant approaches to elasticity specification and estimation: 1) the use of logged (vs. nominal) alcohol prices; and 2) implementation of unnecessarily restrictive assumptions underlying the conventional two-part model. I propose a new approach to elasticity specification and estimation that covers the two key requirements for policy relevance and remedies all such biases. I find evidence of substantial divergence between the new and extant methods using both simulated and the real data. Such differences are profound when placed in the context of alcohol tax revenue generation.

Time limits in tax administration Time limits have an irreplaceable role in law. They are of a crucial importance especially in situations where a certain act (exercise of a right or a fulfillment of obligation) is limited by time so that after a certain time expiration it is possible to state that such an act was not performed and thus to draw legal consequences hereof. The main purpose of a time limit is the demarcation of the state of uncertainty as to whether the act will be performed or not and thus to determine either the legal consequence of the performance of the act or the consequences of the default of time. It is clear that the tax proceedings legislation also needs its time limits. Quite frequently it is necessary to set a certain time period for the performance of an act. This time period is set by a time limit. Otherwise it would be only possible to state that an act has already been performed or not yet been performed. It would however not be possible to state that the act was supposed to be performed, i.e. if a person who could have acted or was supposed to act, in fact did not act, the whole process of administration of taxes would come to a deadlock. The aim of this thesis is, firstly, to generally analyze the concept of time limits. The legal sciences deal with the general...

雖然1997年司法院大法官作成釋字第420號解釋，首次肯認「實質課稅原則」，但直至2009年5月13日立法院才終於增定稅捐稽徵法12條之一，將實質課稅原則納入法規，解決以往在租稅法律主義下缺乏法源根據的困境，使稽徵人員在民眾所採取的交易形式外觀上雖然不符合租稅構成要件，但實際上只要與常規交易下具有相同經濟實質時，能直接針對經濟實質予以課稅。 本研究利用我國五區國稅局十年統計資料，加入政策虛擬變數、時間趨勢變數以及其交互項進行迴歸分析，根據最小平方法(OLS)及固定最小平方虛擬變數模型(LSDV)，探討實質課稅原則入法後，因為稽徵執行力的提升，以平均罰鍰衡量納稅義務人租稅遵從度是否受到改變。 結果顯示實質課稅原則變數對於罰款變動有顯著正向效果，即增訂稅捐稽徵法12條之一更符合租稅法律主義，有助於稅捐單位稽徵效力的提升，所以可以顯著增加罰款收入；此外，本研究也發現實質課稅虛擬變數和時間趨勢交互項顯著為負，表示納稅義務人隨時間增加逐漸意識到稅捐稽徵法12條之一的重要性，故會減少規避行為使平均罰款額下降，顯示政府政策的執行會受到時間影響而產生不同效果。 / The concept of The Principle of Substantive Taxation got approval from No. 420 constitutional interpretation by the Grand Justices in 1997 for the first time, but not until May 13, 2009 did the legislature promulgated 12-1 of the Tax Collection Act in article. Take the Principle of Substantive Taxation into legislation, tax collector have more convincing reasons to solve the dilemma of “Principle of Taxation under the Law”. Most important, it emphasizes the beneficiaries of economic substance as taxpayers, instead of according to the surface of tax regulations to determine the taxpayers. This study use panel data from National Tax Administration of five regions to examine the effects of the legislature promulgated 12-1 of the Tax Collection Act in 2009. We adopt the methods of ordinary least squares (OLS) and Least Square Dummy Variable Model (LSDV), and adding the reform dummy variables, time trend variable and its interaction term into regression to examine whether the enhancement of tax enforcement could increase the average fines or not. The results show that the reform dummy variable has a positive and significant impact on tax evasion collections per fine, that is formulated 12-1 of the Tax Collection Act more in line with the Principle of Taxation under the Law. Besides, the interaction term of reform dummy variable and time trend variable has a negative effect on per fine, which means that taxpayers gradually realize the importance of the regulation over time after the reform. Therefore, taxpayers will reduce tax evasion behavior to decrease the fine collections.

This study investigated and examined the effectiveness and implementation of the existing internal controls designed specifically for exempted micro-enterprises (EMEs) contracting with the South African Social Security Agency (SASSA), in order to minimise the risk of possible tax evasion within the supply-chain management (SCM) processes. The research was completed by conducting a document review and face-to-face interviews with SASSA‟s SCM practitioners, risk manager, fraud and corruption manager, internal-control manager and internal auditor in order to identify risks of possible tax evasion within the SCM processes. It was concluded that there is a risk of possible tax evasion within the SCM processes due to the ineffectiveness and inconsistent implementation of internal controls designed for EMEs contracting with SASSA. This risk could be minimised by incorporating possible anti-tax-evasion procedures in the risk-assessment process, and ultimately in SASSA‟s broader fraud and corruption strategies. Such procedures should then help minimise funds being lost to the fiscus due to tax evasion in the SCM processes. / Taxation / M. Phil. (Accounting Sciences)

Abstracts in English, Afrikaans and Northern Sotho / The tax compliance costs of individual taxpayers in South Africa are unknown, and it is essential to determine, amongst other things, whether these costs pose a risk of causing non-compliance, which could have a negative effect on the collection of tax revenue. Hence, the aim of the study was to assess the tax compliance costs of individual taxpayers in South Africa. The assessment of tax compliance costs entailed calculating these costs in relation to the submission of income tax returns and post-filing activities, ascertaining the determinants of these costs and suggesting ways to reduce them. Using data collected from an online survey conducted among 10 260 taxpayers, it was estimated (applying various methods) that income tax compliance costs of individual taxpayers for the 2018 year of assessment were between 3.61% and 5.31% of the personal income tax revenue. These results compared well with ratios reported in most studies conducted in other countries and showed a reduction from the results obtained from 752 taxpayers for the 2017 year of assessment. Chi-square automatic interaction detection (CHAID), a decision tree modelling technique, was used to ascertain the determinants of tax compliance costs and to identify specific groups of taxpayers associated with distinct ranges of the determinants that were statistically significant predictors of tax compliance costs. This breakdown enabled a better understanding of the influence that the specific values of the continuous determinants, such as the service quality rating of the South African Revenue Service (SARS), and the categorical determinants, such as education level and employment status, have on tax compliance costs. The CHAID analysis therefore provided an additional level of insight not possible with regression analysis, enhancing the usability of the results. Employment status and income tax bracket had the strongest association with tax compliance costs (on average, self-employed taxpayers and taxpayers in the highest income tax bracket had the highest total tax compliance costs). Various other determinants, for example, type of assistance obtained, gender, education level, complexity of tax legislation, complexity of SARS guides, and SARS’s service quality rating were also identified in the analyses. / Die belastingvoldoeningskoste van individuele belastingpligtiges in Suid-Afrika is onbekend, en dit is noodsaaklik om, onder andere, te bepaal of hierdie koste ʼn risiko van nievoldoening inhou wat ʼn negatiewe uitwerking op die insameling van belastinginkomste kan hê. Die doelwit van die studie was dus om die belastingvoldoeningskoste van individuele belastingpligtiges in Suid-Afrika te assesseer. Die assessering van belastingvoldoeningskoste behels die berekening van hierdie koste ten opsigte van die indiening van inkomstebelastingopgawes en ná-indieningsaktiwiteite, bepaling van die determinante van hierdie koste en voorstelle van hoe om dit te verminder. Aan die hand van data wat ingesamel is deur ʼn aanlyn opname onder 10 260 belastingpligtiges, is (deur middel van verskeie metodes) geraam dat inkomstebelasting-voldoeningskoste van individuele belastingpligtiges vir die 2018-assesseringsjaar tussen 3.61% en 5.31% van die persoonlike-inkomstebelastinginkomste was. Hierdie resultate het goed vergelyk met verhoudings soos berig in die meeste studies wat in ander lande uitgevoer is en het ʼn afname gewys in die resultate wat by 752 belastingpligtiges vir die 2017-assesseringsjaar bekom is. Chi-kwadraat outomatiese wisselwerkingbespeuring (chi-square automatic interaction detection – CHAID), ʼn besluitnemingskema-modelleringtegniek, is gebruik om die determinante van belastingvoldoeningskoste te bepaal en om spesifieke groepe belastingpligtiges te identifiseer wat statisties-beduidende voorspellers van belastingvoldoeningskoste is. Hierdie uiteensetting het ʼn beter begrip daargestel van die invloed wat die spesifieke waardes op die deurlopende determinante, soos die diensgehaltegradering van die Suid-Afrikaanse Inkomstediens (SARS), en die kategoriedeterminante, soos onderwysvlak en indiensnemingstatus, op belastingvoldoeningskoste het. Die CHAID-ontleding het dus ʼn bykomende vlak van insig voorsien wat nie moontlik is met regressieontleding nie en sodoende die bruikbaarheid van die resultate verbeter. Indiensnemingstatus en inkomstebelastingkategorie het die sterkste assosiasie met belastingvoldoeningskoste (belastingpligtiges in eie diens en belastingpligtiges in die hoogste inkomstekategorie het gemiddeld die hoogste totale belastingvoldoeningskoste). Verskeie ander determinante, byvoorbeeld, soort bystand verkry, geslag, onderwysvlak, kompleksiteit van belastingwetgewing, kompleksiteit van SARS-gidse en SARS-diensgehaltegradering is ook in die ontledings geïdentifiseer. Die studie het afgesluit met voorstelle om individuele belastingspligtiges se belastingvoldoeningskoste te verlaag. / Ditshenyegelo tša ditefelo tša go obamela melawana ya metšhelo ka balefamotšhelo ka Afrika Borwa ga di tsebje, gomme go bohlokwa gore re tsebe, gareng ga tše dingwe, ge eba ditshenyegelo tše di tliša kotsi ya go baka gore balefamotšhelo ba se ke ba obamela melawana ya metšhelo, e lego seo se ka bago le seabe sa go se loke go kgoboketšo ya letseno la motšhelo. Ke ka lebaka leo, maikemišetšo a dinyakišišo tše e bile go sekaseka ditshenyegelo tša go obamela melawana ya motšhelo ka balefamotšhelo ka Afrika Borwa. Tshekatsheko ya ditshenyegelo tša go obamela melawana ya motšhelo go ra gore re swanetše go hlakanya ditshenyegelo tše mabapi le go romela dingwalwa tša motšhelo le ditiragalo tša ka morago ga go romela dingwalwa tšeo tša motšhelo, go realo e le go tseba dilo tšeo di bakago ditshenyegelo tše le go šišinya mekgwa ya go di fokotša. Ka go šomiša tshedimošo ye e kgobokeditšwego go dinyakišišo tšeo di dirilwego ka inthanete gareng ga balefamotšhelo ba 10 260, go akantšwe gore (ka go diriša mekgwa ye e fapafapanego) ditshenyegelo tša go obamela melawana ya motšhelo wa letseno ka balefamotšhelo ka ngwaga wa tshekatsheko ya metšhelo wa 2018 di bile magareng ga 3.61% le 5.31% ya tšhelete ya motšhelo wa letseno. Dipoelo tše di bapetšwa gabotse le dikelo tšeo di begilwego ka dinyakišišong tše ntši tšeo di dirilwego ka dinageng tše dingwe gomme di laeditše go fokotšega go tšwa go dipoelo tšeo di hweditšwego go balefamotšhelo ba 752 ka ngwageng wa tshekatsheko ya metšhelo wa 2017. Kutollo ya tirišano ya maitirišo ya Chi-square (CHAID), e lego mokgwa wa go nyakišiša sephetho ka maphakga, e šomišitšwe ka nepo ya go tseba dilo tšeo di bakago ditshenyegelo tša go obamela melawana ya motšhelo le go hlaola dihlopha tše itšego tša balefamotšhelo bao ba amanago le mehuta ye e swanago e nnoši ya dihlaodi tšeo di bilego bohlokwa go ya ka dipalopalo mabapi le ditshenyegelo tša go obamela melawana ya motšhelo. Karoganyo ye e kgontšhitše kwešišo ye kaone ya khuetšo yeo dikokwane tše itšego tša dilo tšeo di tšwelago pele go baka se, tša go swana le kelo ya boleng bja tirelo ye e abjago ke Tirelo ya Motšhelo ya Afrika Borwa (SARS), le dilo tšeo di bakago go se obamele melawana ya motšhelo go ya ka makala, go swana le maemo a thuto le maemo a mošomo, go ditshenyegelo tša go obamela melawana ya motšhelo. Tshekatsheko ya CHAID ka fao e file maemo a tlaleletšo a tsebo yeo e sa kgonagalego ka tshekatsheko ya poelomorago, go maatlafatša go šomišega ga dipoelo. Maemo a mošomo le legoro la motšhelo wa letseno di bile le kamano ye kgolo le ditshenyegelo tša go obamela melawana ya motšhelo (ka kakaretšo, balefamotšhelo bao ba itšhomelago le balefamotšhelo bao ba lego ka go legoro la godimo la motšhelo wa letseno ba na le palomoka ya godimodimo ya motšhelo wo ba lefišwago ona). Dilo tše dingwe tša mehutahuta tšeo di bakago go se obamele melawana ya motšhelo, go fa mohlala, mohuta wa thušo ye e hweditšwego, bong, maemo a thuto, go se kwešišege ga melawana ya motšhelo, go se kwešišege ga ditlhahli tša SARS, le kelo ya boleng bja tirelo ya SARS le tšona di utollotšwe ka tshekatshekong. Dinyakišišo di feditše ka go fa ditšhišinyo mabapi le ka fao go ka fokotšwago ditshenyegelo tša go obamela melawana ya motšhelo ka balefamotšhelo. / D. Phil. (Accounting Sciences)