e decrease of ef f lc i ency rto~u i i: r•s frcrr another factor. That Is why these proportional indicators of cannot be used eiiher to determine changes of efficiency of production or to select the mu~t ver i ,,nf, efficiency aggresated p r t f "-! '" b i '·' Correct determination of economic efficiency of social production can be done only on the basts of taking account of combined Impact exerted by all economic growth factors. This brings a problem of commensurabll tty In a general !zing Indicator of diverse trends characterizing separate although closely Inter­related aspects of economic dynamics. The lnteru.U gf rolsln~1l~eoc~ of oiJJ.SlC.l.al~d.u-'tio.D ~~~-1h•~~_gi~Qre.e(abora1•~_m§1DQ~~~9s~r•m~ni_Qt.prQ~ uct!on cojt m~~i~~ble to cQm~A£~-±b•_Q~i~_n~~hJ.•~ A.U.i.IJ.¥PJU._.Qf cost byt w jtb th§l.CJ.Um YOIU· And there exists such method of brlnlng separate criteria to a single generalizing Indicator. For example, for this purpose one may use a national economy production function which relates the volume of national Income (Y) to the volume of labour resources (L) and pro~uctive f~nds (f). Y = Y(L -,F ,t) (1) t t t On the basis of differentiation and local linear homogeneity It follows from (1) that there Is a relationship between the national income increr:•&nt ~Y) C:uri/'l~ e shu·i ptrfod cf time <.at> and the Increments of productive funds(&F) and number of workers (L) for the same period: (2) In optimal planning theory valueslYhF and,YM. are determined efficiency normatlves of uti I lzatlon of the productive funds <EN> 410' and labour resources CF ). Consequently, L •. •Y • E ,F + E .&1. +'IY/;Jt (3) N L Each of the afore-said normative shows by how mney untts will grow the national Income resulting from a unit Increment of the corresponding resource whlfe the volume of the other resources ~Ill remain unchanged. 
**Analysis**
The text discusses the concept of economic efficiency and its measurement, specifically highlighting the importance of considering multiple factors that affect economic growth. It introduces a production function and its derivatives to analyze the relationship between national income, labor resources, and productive funds. The text appears to be focused on macroeconomic theory and its application to optimal planning.

**Category**
Economic development, Industry