another way to reduce deadweight is to require firms to share in the cost of shorttime work as is discussed below in light of their differential coverage by stw schemes and the likely greater tendency of employers to attempt to retain their core workers the empirical analysis of the impact of stw in the recession below distinguishes between temporary and permanent workers to the extent possible participating firms in the work sharing programme in canada were previously required to develop a recovery plan however this requirement has been suspended until at least march in response to the recession takeup of training during stw tends to be low in countries where it is not compulsory while this may provide a rationale for governments seeking to reduce displacement effects to make training compulsory it could also indicate that training often is not appropriate or cannot easily be organised as was concluded by a canadian study of stw hrdc