To what extent is it orofitable for the country to striv ~ after serf-sufficiency in hoth the cereal and livestock sub-sectors? The structure of the Model qi~es a first ided of the data requirements. The ~odel is divided into four geographical zones; two types of farms are consider~dy privat e and public, and classified accordjng to their production ana the technology employed. The resulting strd~ification is thus very disaggregated and differen t~dtes d~nong technology, activity• ownership and region. On the demand sidet a set of demand functions dependinq on J:)rice. clygregate income and population are defined on the national, region a'l and sub-regionat level depending on ~heth~r a given commodity is dssumed to be trade<1 nationally, regionatly or sub-re9i.on-.!lly. In parallel fashion, the retevan t consumer prtces are natt~\alt regi ~nal or sub-re~ional. ln dddition to the5e data on production and ciemana, constraints on production possibjfities are defined on land, family and hired tab­ o~r per season, animal stocks, water, credtt and home consumption. lhese data are broken down according to relevant criteria such as region dnd technology. The ma~n results of the TUNAGRl model are: product~on 1evels, patterns and prices; allocation of resources to activites; agricul­ tural value added; emplo~ rment and price indexes oy region and main commodity groups; and agracultural balance of trade .. More precisely., the requirements as far as tics are concerned are as follows: a.yricultur ,JJ stdtis- As sdid Defore, the data on proauctton are stratified accordin g to the region. the ownership, the commodities ana the techniques. The information requested is simi1ar to that needed for proJeCt anafysis and is m~inly oased on d~ta collected from farm surveys. For crop prouuction. the technology matrix is made up of the technical coeffi­ cients expressin.;, the requtrement'i for different inptJts {se~:ws., cnemicals. etc.) per untt of output. The data requirements for live­
**Analysis**
The text appears to be discussing a model for analyzing the agricultural sector of a country, with a focus on production levels, prices, and resource allocation. It seems to be a technical and data-intensive document, likely used for policy-making or research purposes. The language used is formal and specialized, suggesting that the topic is complex and requires a high level of expertise.

**Category**
Agriculture, forestry and fishing