Stationary time series and its properties

Author: Xiaochen Xian

In this article, I would like to introduce stationary time series and its properties. Stationary time series is one whose properties do not depend on the time at which the series is observed. It has been widely applied and shows strong power in statistical analysis. The time series with any trends, seasonal patterns, or both, are not stationary. These types of time series, however, can often be converted to stationary time series using techniques like de-trending or differencing.

1. What is time series?

Time series, as its name says, is a sequence labeled by time. We denote the time series variable as ${Y_t: t=\cdots, -1, 0, 1 \cdots}$.… Read more

Third Conference on Business Analytics in Finance and Industry – BAFI 2018

Santiago, Chile
January 17th – 19th, 2018
www.baficonference.cl
Twitter: @bafichile

Call for Abstracts

The aim of the BAFI 2018 conference is to bring together researchers and developers from data science and related areas with practitioners and consultants applying the respective techniques in different business-related domains. Our goal is to stimulate an academic exchange of recent developments as well as to encourage the mutual influence between academics and practitioners.

At BAFI 2018, the focus will be on methodological developments aimed at uncovering information contained in large data sets, as well as on business applications in various sectors, among them finance, retail, and telecommunications.… Read more

Bird Strikes

Author: Ting Lei 

1. Introduction

The event of an airborne animal hitting an airplane in flight is referred as bird strike. Although bird strikes are a lesser hazard to aviation than some other well-known hazards such as air turbulence and icing, it still poses a sizable threat to airline safety and do present risk that needs to be addressed. According to Bird Strike Committee USA, wildlife strikes cause over $650 million annually in damage to U.S. civil and military aviation.

The goal of this article is to discuss some of the characteristics of bird strikes, raise the awareness of this issue, and help reduce the likelihood of bird strikes.… Read more

Investigation of Obesity in the United States

Author: Ting Lei

1. Introduction

Obesity is one of the biggest health problems across the United States. According to the data from the National Health and Nutrition Examination Survey:

  • More than 1 in 3 adults are considered to be obese.
  • More than 1 in 20 adults are considered to have extreme obesity.
  • More than 1 in 6 teenagers age from 6 to 19 are considered to be obese.

Obesity is usually accompanied with various other diseases, which combined kill millions of people per year. These diseases include type 2 diabetes, heart disease, high blood pressure, nonalcoholic fatty liver disease, osteoarthritis, cancer, stroke and various others.… Read more

NBA Home Court Advantage Analysis

Author: Ting Lei 

1. Introduction

Every sports fan knows that their favorite teams have more chance to win on the home court; and for professional athletes, they will surely make every effort to secure home-court victories in the regular season. The goal of this article is to 1) determine which teams in the NBA have the best home-court advantage; 2) provide some insights into how does the number of rest days of home and away teams impact the home-court advantage; as well as 3) determine what are some other possible factors to home-court advantage from 2011-2012 through 2015-2016 seasons.

Why do we choose NBA among the four major American pro sports?… Read more