Survey Sampling Methodology in Official Statistics in Latvia Foreign Investment Business Survey

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Survey Sampling Methodology in Official
Statistics in LatviaForeign Investment
Business Survey

• Janis Lapins
• Baltic-Nordic-Ukrainian Summer School on Survey
  Statistics
• Kyiv, August 23-27, 2009

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Structure of the presentation

• Introduction
• BoP and data sources
• Quarterly business survey on foreign investment
• Annual business survey on foreign investment
• Dissemination of data

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Introduction

• Statistics Department of the Bank of Latvia
  (Latvijas Banka, LB) since April 5, 1993
• Balance of payments (BOP) responsibility of LB
  since 2000
• Foreign investments business survey carried out
  by LB since 2001
• Data compilation process (BOP, IIP, FDI, Foreign
  debt), development of methodology
• Maintenance of the compilation system

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Balance of payments

• In economics, the balance of payments (BOP)
  measures the payments that flow between any
  individual country and all other countries.
• It is used to summarize all international
  economic transactions for that country during a
  specific time period, usually a year.
• The BOP is determined by the country's exports
  and imports of goods, services, and financial
  capital, as well as financial transfers.
• It reflects all payments and liabilities to
  foreigners (debits) and all payments and
  obligations received from foreigners (credits).
• Balance of payments is one of the major
  indicators of a country's status in international
  trade, with net capital outflow
• (From Wikipedia, the free encyclopedia).

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Balance of payments compiled at LB

• Quarterly and annual
• by BOPSY codes (by positions used in the IMF
  balance of payments statistics yearbook),
• by country,
• by type of industry (NACE code)
• Monthly only few main positions (mainly for
  internal use)
• IIP by country, by type of industry

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Data sources for compilation of BoP

• Bank of Latvia
• quarterly and annual foreign investment survey of
  companies
• MFI statistics
• statistics on non-bank external payments (ITRS)
• Financial and Capital Market Commission
• aggregated data on investment in banks share
  capital
• aggregated data on banks annual profit/loss and
  its distribution
• Riga Stock Exchange
• prices for companies shares quoted at the Stock
  Exchange
• State Register of Enterprises

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Quarterly business survey on foreign investment
data collected

• Data source for FDI, portfolio investments, other
  investments and related accrued income flows of
  other sectors
• Divided in three parts FDI in Latvia, FDI
  abroad, other foreign assets and liabilities
• Country breakdown
• Full reconciliation of positions and changes in
  positions reflecting net flows, price changes,
  exchange rate changes and other adjustments

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Quarterly survey on foreign investment sampling
frame

• Stratified simple random sampling is used
• The sampling frame is built up using
• Quarterly survey data of the previous year
• State Register of Enterprises
• Information obtained from the CSB
• ITRS data
• Annual survey data on foreign investment
• Other sources (mass media, etc.)
• The sampling frame is updated annually just
  before sampling (significant changes discovered
  during the survey year are updated as soon as
  they have been identified)

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Quarterly survey on foreign investment
stratification

• The activity indicator is calculated for each
  company in accordance with the BOPSY breakdown by
  taking the max transactions value either from the
  survey or ITRS data for the previous year
• The companies are arranged in a descending order
  according to the activity indicator and divided
  into size groups
• The target population is further stratified
  depending on the companys NACE

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Quarterly survey on foreign investment sample
allocation

• The Neymans optimum allocation over strata
  according to the activity indicator is determined
• Some adjustments in the sample allocation are
  made to reach satisfaction quality demands for
  main domains of interest
• Within each stratum the list of companies to be
  included in the sample is drawn by using the
  simple random sampling approach

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Quarterly survey on foreign investment dealing
with non-response

• Reminders by phone allow to reach near to 100 of
  response rate among the significant units
• Response rate 95
• Dealing with non-response
• Big units imputation based on survey data on
  previous periods ITRS data (case by case)
• Other units adjustment of weights

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Response level, 4th quarter, 2008
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Quarterly survey - estimation

• HT estimates for totals
• Unweighted survey data are used for country and
  NACE breakdown
• Grossing up part of the survey data to the whole
  population is showed as Country not specified
  and Kind of activity not classified in output
  tables by country and by NACE breakdown

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Annual survey on foreign investment why needed?

• Sample design and the total sample size of the
  quarterly survey allows to reach the necessary
  quality of estimates anly for flows (and not for
  stocks). Therefore additional annual sample
  survey on foreign investments is carried out
• From units not included in the sample of the
  quarterly survey another stratified simple random
  sample is taken as a sample for annual survey on
  foreign investment. Sampled companies are
  surveyed using a simplified questionnaire

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Annual survey on foreign investment usage of
data

• Data of the annual survey are used for
• Production of high quality estimates of IIP
  annual positions of other sectors
• Production (by combining of the annual IIP
  estimates with the estimates of quarterly flows)
  of quarterly estimates of IIP positions of other
  sectors at the end of quarters
• Updating of the quarterly sampling frame

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Usage of ITRS data

• Data source for compilation of the monthly BoP
• As a supplementary data source
• For building of the sampling frame of the
  quarterly survey of foreign investments
• Updating of the sampling frame during the survey
  year
• For cleaning of quarterly survey data
• For imputation

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Dissemination of data

• Monthly T30 business days
• Quarterly last business day of the next quarter
• FDI flows and positions by
• country
• kind of activity by country
• inflow and outflow components

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Dissemination of data

• Quarterly and annual BoP
• Published in Quarterly Bulletin Latvia's Balance
  of Payments
• Latvia's Balance of Payments Statistics Database
  is available for users at http//www.bank.lv/eng/
  main/all/statistics/bop_stat/database/

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Dissemination of data

• Monthly BoP
• Published in Monthly Bulletin Latvia's Balance of
  Payments (Key Items)
• Since 15.06.2009 the statistical data on Latvia's
  Balance of Payments (Key Items) are integrated in
  the Latvia's Balance of Payments Statistical
  Database available at http//www.bank.lv/eng/main
  /all/statistics/bop_stat/database/

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THANK YOU !