BBelow are some key financial ratios for Amazon and Walmart, two competitors in the retail market, over a three year period. Pick one of the financial ratios, complete a time-series and cross sectional analysis.

Below are some key financial ratios for Amazon and Walmart, two competitors in the retail market, over a three year period. Pick one of the financial ratios, complete a time-series and cross sectional analysis. Amazon \\begin{tabular}{|l|l|l|l|l|} \\hline & \\multicolumn{2}{|c|}{} & \\multicolumn{2}{|c|}{} \\\\ \\hline Days in Inventory & \\( \\mathbf{1 2 - 2 0 1 7} \\) & \\( \\mathbf{1 2 - 2 0 1 6} \\) & \\( \\mathbf{1 2 - 2 0 1 5} \\) \\\\ \\hline Receivables Turnover & 36.59 & 16.54 & 37.41 & 39.78 \\\\ \\hline Asset.Turnover & 1.66 & 18.42 & 17.78 \\\\ \\hline Current Ratio & 1.04 & 1.83 & 1.78 \\\\ \\hline Debt/Equity & 1.37 & 1.04 & 1.08 \\\\ \\hline Return on Equity & \12.91 & 0.79 & 1.06 \\\\ \\hline Interest Coverage & 5.49 & \14.52 & \4.94 \\\\ \\hline Profit Margin & \1.71 & 9.04 & 4.42 \\\\ \\hline \\end{tabular}