Introduction

The Quick Start aims to introduce the JDemetra+ 2.2 software, which enables the user to perform seasonal adjustment and other operations. Two seasonal adjustment methods are implemented: X-12-ARIMA/X-13ARIMA-SEATS developed at the U.S. Census Bureau, and TRAMO/SEATS developed by Victor Gómez and Agustín Maravall, from the Bank of Spain. The Quick Start gives working instructions on how to install and launch the software. It includes a step-by-step description of how to perform the first analysis with JDemetra+. The dataset used to illustrate the JDemetra+ functionalities is accessible here and can be used to replicate the results presented in the document.

The Quick Start is intended for beginners, who have only a basic knowledge of seasonality and its estimation in time series. Therefore, the case study included in this document is a basic one. For an explanation of each step of more advanced examples refer to the User Guide. Information about the JDemetra+ software and its functionalities is included in the *Reference Manual.

It is assumed that the reader is familiar with time series related concepts. Readers with insufficient background to follow this document are encouraged to refer to an appropriate textbook, e.g. CHATFIELD (2004). Some background knowledge about seasonality in the time series can be gained from the e-learning courses on Seasonal Adjustment.

The Quick Start neither describes in detail how the seasonal adjustment methods work, nor the underlying mathematics. For those readers interested in studying seasonal adjustment methods, brief sketches of the X-13ARIMA-SEATS and TRAMO/SEATS algorithms and concepts as well as a bibliography are included in this Wiki.