spacing - Align (center) header row in table - TeX - LaTeX Stack

I use @{\hskip 50pt} to separate columns in my table. The problem which arises is that I add this extra space after a multicolumn. This also moves the header row so that it is no longer centred. Is

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The Stata-to-LaTeX guide. The guide provides a set of templates

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vertical alignment - vertically central aligning the table cell

table spacing between lines - TeX - LaTeX Stack Exchange

Center alignment with multirow package - TeX - LaTeX Stack Exchange

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