Ruptures in the historic relation between labour input, and product output - what we broadly call productivity- and globalisation of markets are too recent to be reflected in historic data.

And you have the labour input, measured in hours worked, of which more in a moment.

Standards of husbandry are generally much higher than would be the case for conventional farming, with a higher labour input, higher costs and, usually, lower yields.

There was developed the system of interpreters of the dialogue person - computer, intended for acceleration and reduction of labour input of creation of appropriate appendices.