Alternative Equation Formats

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MathML

\frac{M}{M - K} \sum_{i = 1}^{N} \sum_{t = 1}^{T_{i}} {\hat{ϵ}}_{i t}^{2} x_{i t} x_{i t}^{^{'}} + \frac{M}{M - K} \sum_{i = 1}^{N} \sum_{t = 1}^{T_{i}} \sum_{s = 1}^{t - 1} {\hat{ϵ}}_{i t} {\hat{ϵ}}_{i s} (x_{i t} x_{i s}^{^{'}} + x_{i s} x_{i t}^{^{'}})

Math Rendered as SVG

Math as LaTeX Source

\[ \frac{M}{M-K}\sum _{i = 1} ^{N} \sum _{t=1}^{T_ i} \hat{\epsilon }_{it} ^{2}\mb{x} _{it} \mb{x} _{it} ^{'} +\frac{M}{M-K}\sum _{i = 1} ^{N} \sum _{t=1}^{T_ i} \sum _{s=1}^{t-1} \hat{\epsilon }_{it}\hat{\epsilon }_{is} \left(\mb{x} _{it} \mb{x} _{is} ^{'} + \mb{x} _{is} \mb{x} _{it} ^{'}\right) \]