I would like to align the text within following table to the top and left. I'm pretty new to LaTeX so I have no clue. Sorry, if this questions has been asked already:
\documentclass{article}
\usepackage[latin1]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[german]{babel}
%\usepackage{array}
\usepackage{lscape}
\usepackage{booktabs}
\begin{document}
\newcolumntype{C}[1]{>{\arraybackslash}m{#1}}% I found this somewhere but don't remember where
\begin{landscape}
\begin{tabular}{C{4cm}C{4cm}C{4cm}C{4cm}} %<--- damit geht es jetzt auch ;)
\toprule
Cluster 1 & Cluster 2 & Cluster 3 & Cluster 4 \\
\midrule
\begin{itemize}
\item Canada, France, Germany
\item Austria, Belgium, Netherlands, Switzerland
\item Finland, Iceland, Norway, Sweden
\item Greece, Portugal, Spain
\item New Zealand
\end{itemize}
&
\begin{itemize}
\item Italy, Japan, United Kingdom, United States
\item Denmark, Ireland
\item Estonia, Hungary
\end{itemize}
&
\begin{itemize}
\item Luxembourg
\item Czech Republic, Slovenia
\item Australia, Korea, Turkey
\end{itemize}
&
\begin{itemize}
\item Poland, Slovak Republic
\item Israel
\end{itemize}
\\
\bottomrule
\end{tabular}
\end{landscape}
\end{document}