checkRd: (-1) smoo_dataset.Rd:20: Lost braces; missing escapes or markup?
    20 | The smoother substitutes an original raw value $y_{m,i,t}$ of country $m$
       |                                                   ^
checkRd: (-1) smoo_dataset.Rd:22: Lost braces
    22 | $$\\check{y_{m,i,t}} = y_{m,i,t-1} ~ (1-w)/2   +w ~y_{m,i,t} +y_{m,i,t+1} ~(1-w)/2$$,
       |          ^
checkRd: (-1) smoo_dataset.Rd:22: Lost braces; missing escapes or markup?
    22 | $$\\check{y_{m,i,t}} = y_{m,i,t-1} ~ (1-w)/2   +w ~y_{m,i,t} +y_{m,i,t+1} ~(1-w)/2$$,
       |             ^
checkRd: (-1) smoo_dataset.Rd:22: Lost braces; missing escapes or markup?
    22 | $$\\check{y_{m,i,t}} = y_{m,i,t-1} ~ (1-w)/2   +w ~y_{m,i,t} +y_{m,i,t+1} ~(1-w)/2$$,
       |                          ^
checkRd: (-1) smoo_dataset.Rd:22: Lost braces; missing escapes or markup?
    22 | $$\\check{y_{m,i,t}} = y_{m,i,t-1} ~ (1-w)/2   +w ~y_{m,i,t} +y_{m,i,t+1} ~(1-w)/2$$,
       |                                                      ^
checkRd: (-1) smoo_dataset.Rd:22: Lost braces; missing escapes or markup?
    22 | $$\\check{y_{m,i,t}} = y_{m,i,t-1} ~ (1-w)/2   +w ~y_{m,i,t} +y_{m,i,t+1} ~(1-w)/2$$,
       |                                                                 ^