Labour Price Index Labour Market Statistics (LAMAS) Working Group

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Presentation transcript:

Labour Price Index Labour Market Statistics (LAMAS) Working Group 10-11 October 2017 Florentina Alvarez Elisa Martín National Statistical Institute.- Spain

Why a Labour Price Index ? 2

Why a Labour Price Index ? An example 3

LPI Definition The LPI should provide a measure of changes over time in the price paid for labour and should not be affected by changes in the quality or quantity of work performed. (i.e. by changes in the composition of the labour force, hours worked, or changes in characteristics of employees). So, disaggregated information is needed on: local unit individual employees 4

Characteristics of the project Source: The Structure of Earnings Surveys (four-yearly and annual): The random unit selection procedure corresponds to two-stage stratified sampling where the first stage units are local units, while the second stage units are the employees. Sample size: 28,000 local units and 215,000 employees Population studied: employees Geografical scope: the whole territory of Spain Period of reference: Year Analyzed variable: hourly earnings 5

Characteristics of the project Information on each local unit: Economic activity (B-S NACE rev.2) Region (17 regions) Size (all sizes included) Information on each individual employee: Personal characteristics (Gender, age, citizenship ) Job characteristics (Occupation by ISCO-08, type of contract, seniority in the unit) Wages and salaries Hours paid 6

Major formulas   Weights 7

Major formulas The annual link for year j to j+1 is: The Laspeyres chain index formula for year j for a set of Q cells c with reference year k is defined: 8

Level of disaggregation of the variables Information on each local unit: Economic activity → 18 sections (B-S NACE rev.2) Regions → 17 regions Size → 8 size classes (1-4, 5-9, 10-19, 29-49, 50-99, 100-199, 200-499, ≥500) Information on each individual employee: Gender → 2 classes (male and female) Age → 5 intervals (<25, 25-34, 35-44, 45-54, >55) Citizenship →2 classes (resident with citizenship and resident with foreign citizenship) Occupation → 9 classes (main groups of ISCO-08, 6-7 joined) Type of contract→ 2 classes (indefinite duration and temporary/fixed duration) Seniority in the unit → 6 intervals (<1, 1-3, 4-10, 11-20, 21-29, ≥30) More than 1,000,000 combinations are obtained !! 9

Regression Model For each year a, it is assumed that the hourly earnings, G, of the employees belonging to cell c, is: (1) Where, is a vector of dimension (1 x p) of characteristics is a vector of p unknown parameters, of dimension (p x 1) is the random component of the model in the year a that verify: 10

Regression Model As the data used in the regression model are derived from samples drawn from a population with a given sample design, it is used an ordinary least squares estimator weighted by the sampling weights (WOLS) from Where, is the diagonal matrix of dimension x of sampling weights, and its variance is: where the matrix has dimension pxp 11

Regression Model In the compilation of the LPI, it is necessary to have, for each year, the estimated average hourly earnings corresponding to each cell. Such estimated hourly earnings average is obtained using the formula (1); thus, the estimated hourly earnings of cell c, in year a, is the following: It is a biased estimator. To correct the bias: Where, being 12

Dissemination plan and Calendar The data will be presented in tables format, disaggregated by the following classification variables: Section of economic activity NACE Rev.2 B-S Size Region Gender Occupation Type de contract Age Citizenship Seniority in the unit Annual weights 13

Dissemination plan and Calendar The periodicity of the dissemination is annual Schedule of implementation: The 2014 results (including series back to 2008) were published on 18 NOV 2016, together with SES2014 results. The 2015 results were published on 3 OCT 2017. http://www.ine.es/dyngs/INEbase/en/operacion.htm?c=Estadistica_C&cid=1254736177027&menu=ultiDatos&idp=1254735976596 14

Some results of comparison with ASES 15

Some results of comparison with ASES 16

Some results of comparison with ASES 17

Some results of comparison with ASES 18

Some results of comparison with ASES 19

Comparison LPI-LCI 20

Comparison LPI-LCI 21

Comparison LPI-LCI 22

Comparison LPI-LCI 23

Conclusions The results obtained using this methodology show that the changes in the employment composition in recent years have had an impact in the evolution of the hourly earnings shown by the classical surveys. The LCI adjusted part of this impact but is not enough, at least in Spain, where the movements in the number of employees have been very great and have affected other characteristics apart from the activity. The advantage of this method is its low cost because it is performed only by using existing sources. The drawbacks are that it is not a short term indicator and its lack of timeliness. The cost and burden of carrying out a short term survey with the characteristics of ASES make impossible to address it for the moment, so this statistic will continue being annually. 24

Thanks for your attention elisa.martin.hernandez@ine.es