(RMSE), the mean absolute error (MAE), the mean absolute percentage error (MAPE), the Nash–Sutcliffe coefficient of efficiency (E), the coefficient of correlation (r), the mean percent error (MPE), the mean root square errors (MRSE), the index of agreement (AOI), the pooled average ...
What is the discrepancy between what is referred to as ‘log difference’ and ‘first difference’ when differencing a time series? I am looking to use ACF/PACF with stationary/transformed data to estimate my ARIMA parameters but I keep running into these two ‘differences’ and I can’t tel...
(H2): Innovative environment has a positive effect on technology innovation, while regional differences and temporal variations of effect size exist. There are many arguments about the relationship between enterprise scale and innovation efficiency [35,36]. For instance, Pavitt, Robson and Townsend (...