Commercial Livestock and Poultry Survey 2010-2016 - Philippines

Abstract
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The Republic of the Philippines is making great efforts to develop agriculture at a pace necessary to meet the food requirements of the fast growing population. It has become necessary to use current agricultural statistics that will help present an accurate picture of the country's food situation. Especially important are the expected supply and consumption requirements of the people, particularly of meat products. The Commercial Livestock and Poultry Survey (CLPS) aims to provide an estimate of the current supply and disposition practices for commercial livestock and poultry in the country.

The data to be obtained from this survey would not only be important from the point of view of the national economy but also from that of the farmer. The government should have available accurate information with which to anchor its major agriculture policy decisions, of which the farmers are the ultimate beneficiaries. For instance, a decision on whether to import or export livestock and poultry products has its effects not only on the national economy but also on the individual farmer. Such national decision will directly affect the breeding and trading decisions of livestock and poultry breeders in the country.

Geographic coverage
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National Coverage

Analysis unit
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Agricultural holdings

Universe
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All Swine Farms that are considered as commercial farms. Commerical farm refers to a farm or household operated by a farmer/household/operator that raises at least one of the following:

· at least 21 heads of adult and zero head of young animals
· at least 41 heads of young animals and above
· at least 10 heads of adult and 22 heads of young and above

Kind of data
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Sample survey data [ssd]

Sampling procedure
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The domain of the survey is the province. All farms or farm establishments in the province that are considered as commercial farms constitute the frame for the province. The sampling design depends on the number of farms and the corresponding maximum housing capacities of the farms in the province. In provinces with 20 farms or below, all the farms are completely enumerated. For provinces with large number of farms or those with 21 or more farms/farm establishments, stratification is applied using Dalenius Hodges method with the maximum housing capacity as the measure of size. The number of strata per province ranges from 2 to 4 depending on the population or on the heterogeneity or homogeneity of the stratification variable.

Sample allocation for each stratum is done using the Neyman procedure with coefficient of variation set at 5 percent. A minimum of 5 sample farms per stratum is allocated, i.e. if the computed sample size for a stratum is less than 5, then 5 sample farms are taken from the stratum. A stratum may have less than 5 sample farms only if the total number of farms in that stratum is less than 5. Selection of sample farms from each stratum is done using simple random sampling.

Mode of data collection
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Face-to-face paper [f2f]

Cleaning operations
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Prior to data encoding, the accomplished survey returns were manually edited and coded. Manual editing is the process of checking the responses indicated in the CLPS questionnaire in terms of its acceptability and validity. This activity aimed to improve the quality of data collected by the Statistical Researchers (SRs). This also involved the checking of data items based on criteria like completeness of data, consistency with other data items and data ranges.

Response rate
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For CLPS January Round 2016, the response rates is above 90 percent.

摘要
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菲律宾共和国正不遗余力地发展农业，以期满足快速增长的国民人口对粮食的需求。利用当前农业统计数据，以便准确反映国家粮食状况，已成为必要之举。特别是，人们预期的供应和消费需求，尤其是肉类产品，尤为重要。商业畜禽调查（CLPS）旨在对国家商业畜禽的当前供应和处置实践进行估算。

从本调查中获得的数据，不仅对国民经济具有重要意义，对农民而言亦然。政府应具备准确的信息，以便作为其主要农业政策决策的依据，而农民则是这些决策的最终受益者。例如，关于是否进口或出口畜禽产品的决策，不仅影响国家经济，也对单个农民产生直接影响。此类国家决策将直接影响国内畜禽养殖户的育种和贸易决策。

地理覆盖范围
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全国覆盖

分析单位
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农业经营单位

总体
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所有被视为商业农场的猪场。商业农场是指由农民/家庭/运营商经营，至少饲养以下之一的生产单位：

· 至少21头成年动物和0头幼年动物
· 至少41头幼年动物及以上
· 至少10头成年动物和22头幼年动物及以上

数据类型
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样本调查数据 [ssd]

抽样程序
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调查领域为省份。该省份内所有被视为商业农场的农场或农场企业构成抽样框架。抽样设计取决于省份内农场数量及相应最大饲养容量。在农场数量20个或以下的省份，对所有农场进行完全列举。对于农场数量较多或拥有21个或以上农场/农场企业的省份，采用Dalenius-Hodges方法进行分层，以最大饲养容量作为规模衡量标准。每个省份的层数从2到4不等，具体取决于人口或分层变量的异质性和同质性。每个层的样本分配采用Neyman程序，变异系数设定为5%。每个层至少分配5个样本农场，即如果某层的计算样本量小于5，则从该层中选取5个样本农场。只有在该层农场总数少于5个的情况下，某层才可能拥有少于5个样本农场。从每个层中选取样本农场采用简单随机抽样。

数据收集方式
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面对面纸质问卷 [f2f]

数据清理操作
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在数据编码之前，完成的调查返回问卷被手动编辑和编码。手动编辑是检查CLPS问卷中指示的响应的可接受性和有效性的过程。该活动旨在提高统计研究人员（SRs）收集数据的质量。这还涉及根据数据完整性、与其他数据项的一致性以及数据范围等标准检查数据项。

响应率
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对于2016年1月CLPS调查，响应率超过90%。