Page Break while converting from 1 column to 2 column

Question

\documentclass{elsarticle}
\usepackage{lipsum}
\begin{document}
\begin{frontmatter}
\title{This is the title}

\author[add1]{Author1}
\ead{[email protected]}
\address[add1]{Department of Institute1}

\author[add2]{Author1}
\ead{[email protected]}
\address[add2]{Department of Institute2}

\begin{abstract}
 Happiness is a mental or emotional state of well-being defined by positive or pleasant emotions ranging from contentment to intense joy.[1] Happy mental states may also reflect judgements by a person about their overall well-being.[2] A variety of biological, psychological, economic, religious and philosophical approaches have striven to define happiness and identify its sources. Various research groups, including positive psychology and happiness economics are employing the scientific method to research questions about what "happiness" is, and how it might be attained.
\end{abstract}

\begin{keyword}
\textbf{Index Terms:} 
\end{keyword}
\end{frontmatter}

\twocolumn
\section{The Elsevier article class}

 Happiness is a mental or emotional state of well-being defined by positive or pleasant emotions ranging from contentment to intense joy.[1] Happy mental states may also reflect judgements by a person about their overall well-being.[2] A variety of biological, psychological, economic, religious and philosophical approaches have striven to define happiness and identify its sources. Various research groups, including positive psychology and happiness economics are employing the scientific method to research questions about what "happiness" is, and how it might be attained.
Happiness is a mental or emotional state of well-being defined by positive or pleasant emotions ranging from contentment to intense joy.[1] Happy mental states may also reflect judgements by a person about their overall well-being.[2] A variety of biological, psychological, economic, religious and philosophical approaches have striven to define happiness and identify its sources. Various research groups, including positive psychology and happiness economics are employing the scientific method to research questions about what "happiness" is, and how it might be attained.
Happiness is a mental or emotional state of well-being defined by positive or pleasant emotions ranging from contentment to intense joy.[1] Happy mental states may also reflect judgements by a person about their overall well-being.[2] A variety of biological, psychological, economic, religious and philosophical approaches have striven to define happiness and identify its sources. Various research groups, including positive psychology and happiness economics are employing the scientific method to research questions about what "happiness" is, and how it might be attained.
\end{document}

Hi all, I am looking to write title, author, abstract and keywords using single column format (full width text) while rest of the document in 2 column format. But, the document encounters a page break after keywords. Following is a minimal working example. Thank you so much for help :)

Answer 1

First off, remove the instruction \twocolumn. Then, either provide the single documentclass option 5p or the pair of document class options 3p and twocolumn. I.e., write either

\documentclass[3p,twocolumn]{elsarticle}

or

\documentclass[5p]{elsarticle}

(The 5p option goes with twocolumn by default.)

Which method is better? I have no idea. It depends on the particular journal and its formatting requirements.