\documentclass[12pt,titlepage]{article}
\usepackage{setspace} % Single-spacing, double-spacing, e.g., \setstretch{1.0}
\usepackage{ifthen}
\usepackage{booktabs}
\usepackage{array}
\usepackage{multirow}
\usepackage{tabularx}
\usepackage[font=bf, labelsep=period]{caption}
\usepackage{changepage}
\usepackage{amsmath}
\usepackage{graphicx}
\usepackage{epstopdf}
\usepackage{endnotes}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Document Dimensions
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\setlength{\textwidth}{6.2in}
\setlength{\textheight}{8.6in}
\setlength{\topmargin}{-0.1in}
\setlength{\oddsidemargin}{0in}
\setlength{\parskip}{2mm}
\newcommand{\otoprule}{\midrule[\heavyrulewidth]}
\setstretch{1.6}
\date{}
\begin{document}
\begin{titlepage}
\title{some title}
\author{blah\thanks{blah}, blah\thanks{blah}, blah\thanks{blah}, blah\thanks{\textbf{Corresponding author:} blah}, and blah\thanks{blah}}
\textbf{Keywords:} Performance Measure, Performance Manipulation, Return Smoothing
\textbf{JEL Classification:} C10, G10, G20
\maketitle
\end{titlepage}
\end{document}
The above produces the following:


However I want to have the text that says JEL classification and Keywords right ABOVE the author affiliations on the title page, but when I compile I keep getting them on separate pages. How can I make them appear on the same page?
{\let\newpage\relax\maketitle}rather than just\maketitle. – Werner Apr 30 '14 at 19:16\maketitlewithin thetitlepageenvironment. To customise the \maketitle command, you can take a look at thetitlingpackage. It define 4\maketitlehookso that maketitle can print additional elements. – Bernard Apr 30 '14 at 19:43