\documentclass{beamer}
\usepackage{beamertheme-bilkent-econ}
\usepackage{amssymb}
\usepackage{amsmath}
\usepackage{mathpazo}
\usepackage{hyperref}
\usepackage{multimedia}
\usepackage{graphicx}
\usepackage{wrapfig}
\usepackage{ulem}
\usepackage{color}
\usepackage{amsfonts}
\usepackage{adjustbox}
\setcounter{MaxMatrixCols}{30}
\newenvironment{stepenumerate}{\begin{enumerate}[<+->]}{\end{enumerate}}
\newenvironment{stepitemize}{\begin{itemize}[<+->]}{\end{itemize}}
\newenvironment{stepenumeratewithalert}{\begin{enumerate}[<+-| alert@+>]}{\end{enumerate}}
\newenvironment{stepitemizewithalert}{\begin{itemize}[<+-| alert@+>]}{\end{itemize}}

% Define custom graphics path - adjust as needed
\graphicspath{{./figures/}{./images/}}

% Custom commands
\newcommand{\bup}{\Big\uparrow}
\newcommand{\Bup}{\Bigg\uparrow}
\newcommand{\bdown}{\Big\downarrow}
\newcommand{\Bdown}{\Bigg\downarrow}
\newcommand{\bmid}{\Big\mid}
\newcommand{\Bmid}{\Bigg\mid}

\title{Topic}
\subtitle{Topic}
\author{Author} % This is used in the footer
\institute{Institution}
\date{\today}

% Define co-authors using the new command (5 authors: 3 in first row, 2 in second row)
\coauthors{%
  \begin{tabular}[c]{ccccc}%
    \textbf{Name Surname} & \textbf{Name2 Surname2} \\
    \textit{Institution} & \textit{Kurumlar}
  \end{tabular}%
  \\[0.8em]%
}

% Define location
\location{Location}

\begin{document}
\frame{\titlepage}

\addtocounter{framenumber}{-1} % subtract one so title page not counted

%-------------------------------------------------------------

\begin{frame}
\frametitle{Page 1}

\begin{itemize}

\item Item 1

\item Item 2

\item Item 3

\end{itemize}
\end{frame}

\end{document}