Business Knowledge Series Kurs

Durchgeführt von Véronique Van Vlasselaer, PhD Researcher, KU Leuven.

A typical organization loses an estimated 5 of its yearly revenue to fraud. This course will show how learning fraud patterns from historical data can be used to fight fraud. To be discussed is the use of supervised learning (using a labeled data set), unsupervised learning (using an unlabeled data set), and social network learning (using a networked data set). The techniques can be applied across a wide variety of fraud applications, such as insurance fraud, credit card fraud, anti-money laundering, healthcare fraud, telecommunications fraud, click fraud, tax evasion, counterfeit, etc. The course will provide a mix of both theoretical and technical insights, as well as practical implementation details. The instructor will also extensively report on his recent research insights about the topic. Various real-life case studies and examples will be used for further clarification.

Lernen Sie, wie Sie / Learn how to

• preprocess data for fraud detection (sampling, missing values, outliers, categorization, etc.)
• build fraud detection models using supervised analytics (logistic regression, decision trees, neural networks, ensemble models, etc.)
• build fraud detection models using unsupervised analytics (hierarchical clustering, non-hierarchical clustering, k-means, self organizing maps, etc.)
• build fraud detection models using social network analytics (homophily, featurization, egonets, PageRank, bigraphs, etc.).

Zielgruppe / Who should attend

Fraud analysts, data miners, and data scientists; consultants working in fraud detection; validators auditing fraud models; and PhD researchers in financial services companies, banks, insurance companies, government institutions, healthcare institutions, and consulting firms

Verfügbare Schulungsformen / Formats available	Dauer
Präsenzkurs:	2.0 Tage
E-Learning:	21 Stunden/180 Tag Lizenz	Systemvoraussetzungen

Before attending this course, you should have a basic knowledge of statistics, including descriptive statistics, confidence intervals, and hypothesis testing.

In diesem Kurs wird mit folgenden Software Modulen gearbeitet: SAS Enterprise Miner Software

Base SAS and SAS Enterprise Miner will also be used in this course.

Introduction

Fraud Detection

• the importance of fraud detection
• defining fraud
• anomalous behavior >li>fraud cycle
• types of fraud
• examples of insurance fraud and credit card fraud
• key characteristics of successful fraud analytics models
• fraud detection challenges
• approaches to fraud detection

Data Preprocessing

• motivation
• types of variables
• sampling
• visual data exploration
• missing values
• outlier detection and treatment
• standardizing data
• transforming data
• coarse classification and grouping of attributes
• recoding categorical variables
• segmentation
• variable selection

Supervised Methods for Fraud Detection

• target definition
• linear regression
• logistic regression
• decision trees
• ensemble methods: bagging, boosting, random forests
• neural networks
• dealing with skewed class distributions
• evaluating fraud detection models

Unsupervised Methods for Fraud Detection

• unsupervised learning
• clustering approaches: hierarchical clustering, k-means clustering, self-organizing maps
• peer group analysis
• break point analysis

Social Networks for Fraud Detection

• social networks and applications
• is fraud a social phenomenon?
• social network components
• visualizing social networks
• social network metrics
• community mining
• social network based inference (network classifiers and collective inference)
• from unipartite toward bipartite graphs
• featurizing a bigraph
• fraud propagation
• case study

Fraud Analytics: Putting It All to Work

• quantitative monitoring: backtesting, benchmarking
• qualitative monitoring: data quality, model design, documentation, corporate governance