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%\titlehead{Hochschule für angewandte Wissenschaften Hamburg}
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Package array Error: Illegal pream-token (S): `c' used ]{table.csv}

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@Article{dargay07,
AUTHOR = {Joyce Dargay and Dermot Gately and Martin Sommer},
TITLE = {{V}ehicle {O}wnership and {I}ncome {G}rowth, {W}orldwide: 1960-2030},
JOURNAL = {Energy Journal},
YEAR = {2007},
VOLUME = {28},
NUMBER = {4},
}

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the proposal by \citet{dargay07} that
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\begin{tabularx}{\textwidth}{!{\vrule width 1.5pt}C{2.5cm}:C{2.5cm}:C{2.5cm}|X!{\vrule width 1.5pt}}
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\multicolumn{3}{!{\vrule width 1.5pt}C{7.5cm}|}{Income elasticity, $\epsilon_1$, of per capita motor-vehicle ownership for}
 & \multirow{2}{7cm}{Form of demand path of per capita motor-vehicle ownership w.r.t per capita income}\\\cline{1-3}
Low income range & Medium income range & High income range & \\
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$\epsilon_1=\text{const.}$ & $\epsilon_1=\text{const.}$ & $\epsilon_1=\text{const.}$
 & \textit{Linearly increasing} - motor-vehicle ownership increases at a constant rate (Form I)\\
\hdashline
$\epsilon_1>1$ (Superior good) & $0<\epsilon_1<1$ (Normal good) & $\epsilon_1=0$ (Neutral good)
 & \textit{S-shape} - initially increasing at an increasing rate, 
 then increasing at a decreasing rate and finally remaining at constant (Form II)\\
\hdashline
$\epsilon_1>1$ (Superior good) & $0<\epsilon_1<1$ (Normal good) & $\epsilon_1<0$ (Inferior good)
 & \textit{Inverse U-shape} - initially increasing at an increasing rate, 
 then increasing at a decreasing rate and finally decreasing at a decreasing rate (Form III)\\
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