R Under development (unstable) (2025-08-17 r88631 ucrt) -- "Unsuffered Consequences"
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> # usl-nlxb.R --- Test method nlxb
> 
> library(usl)
> 
> options(scipen=9)
> 
> data(specsdm91)
> 
> u <- usl(throughput ~ load, specsdm91, method = "nlxb")
> 
> signif(coef(u)[['alpha']], 2)
[1] 0.028
> signif(coef(u)[['beta']], 2)
[1] 0.0001
> signif(coef(u)[['gamma']], 2)
[1] 90
> 
> proc.time()
   user  system elapsed 
   0.23    0.06    0.23