2013 Master Sample Design

The 2013 Master Sample (MS) design for household-based surveys is a two-stage cluster sampling design with barangays/Enumeration Areas (EAs) or group of adjacent small barangays/EAs as the primary sampling units (PSUs), and housing units/households within the sample PSU as the secondary sampling units (SSUs). The 2013 MS sampling frame is constructed based on the results of the 2015 Population Census. The EA Reference File (EARF) of the 2015 Census of Population is used as the PSU frame while the 2015 list of households for each of the PSUs are used as the SSU frame.

 

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Provinces and Highly Urbanized Cities as Sampling Domain

To provide subnational or provincial level statistics with precise estimates the 2013 MS has 117 major sampling domains as follows: 81 provinces (including the newly created province Davao Occidental); 33 highly urbanized cities (including 16 cities in the National Capital Region); and 3 other urban areas (Pateros, Isabela City, and Cotabato City).

Primary Sampling Units

In the 2013 Master Sample Design each sampling domain (i.e, province/HUC) is divided into exhaustive and non-overlapping area segments known as Primary Sampling Units (PSUs) with about 100 to 400 households. Thus, a PSU can be a barangay/Enumeration Area (EA) or a portion of a large barangay or two or more adjacent small barangays/EAs.

In the Philippines, a total of 87,098 PSUs are formed out of 42,036 barangays. Of this number, a total of 910 barangays are reported as least accessible while 734 are identified to have peace and order problem. Least accessible barangays (LABs) are excluded in the selection process and thus have no chance of being selected.

Number of Households, Barangays, EAs, PSUs, LABs, and POPs by Region

Area

 Number of Households (as of August 1, 2015)

Number of Barangays

 Number of EAs

Number of PSUs formed

Total Number of Least Accessible Barangays (LABs)

Total Number of Barangays with Peace and Order Problems (POPs)

Philippines

22,984,971

42,036

93,781

87,098

910

734

NCR

3,095,766

1,706

11,959

11,638

0

10

CAR

395,881

1,176

1,853

1,653

66

7

Region I

1,151,629

3,265

4,824

4,608

7

0

Region II

804,380

2,311

3,410

3,198

45

4

Region III

2,566,558

3,102

9,848

9,476

23

12

Region IVA

3,404,958

4,018

13,209

12,378

166

43

MIMAROPA

682,668

1,459

2,647

2,464

135

22

Region V

1,216,421

3,471

5,120

4,812

63

25

Region VI

1,014,987

3,389

4,582

3,998

102

92

Region VII

1,388,475

2,446

5,835

5,485

3

0

NIR

1,012,323

1,219

3,910

3,774

21

13

Region VIII

985,913

4,390

5,204

4,174

84

193

Region IX

799,219

1,904

3,356

3,236

3

122

Region X

1,042,929

2,022

4,298

4,075

25

59

Region XI

1,177,461

1,162

4,499

4,368

23

10

Region XII

1,050,680

1,195

3,870

3,768

10

11

ARMM

620,385

2,490

3,037

1,812

117

59

Caraga

574,338

1,311

2,320

2,181

17

52

2x2x2 Implicit Stratification

For each province/HUC domain, All PSUs are ordered and sorted according to the following: (1) North-South/West-East Geographic location; (2) Decreasing Proportion of HHs with Overseas Worker; and (3) Decreasing wealth Index.

Replicates

From the ordered list of PSUs, all possible systematic samples of 6 PSUs are drawn to form a replicate for the most of the province domain i.e., 75 out of 81 provinces while all possible systematic samples of 8 PSUs are drawn to form a replicate for most of the HUCs, that is, 31 of 33 HUCs.

Three (3) PSUs are drawn to form a replicate for small province/HUC domains such as Batanes, Guimaras, Siquijor, Camiquin, Apayao, Dinagat Island, San Juan City, Pateros, and City of Isabela while Five (5) PSUs per replicate are allocated for Lucena City and Cotabato City.

For instance, in the province of Cagayan with 1,062 PSUs formed. A total of 1062/6 = 177 possible systematic samples of size 6 or 177 R groups or replicates are made.

The table below shows the allotted number of PSUs per replicate and the resulting number of replicates formed per sampling domain.

Number of Replicates formed per Domain

Area

Number of PSUs formed

Allotted Number of PSUs per Replicate

Number of Replicates formed

       

PHILIPPINES

87,098

   
       

NATIONAL CAPITAL REGION (NCR)

11,638

   

CITY OF MANILA

1584

8

198

CITY OF MANDALUYONG

336

8

42

CITY OF MARIKINA

368

8

46

CITY OF PASIG

672

8

84

QUEZON CITY

2576

8

322

CITY OF SAN JUAN

111

3

37

CALOOCAN CITY

1400

8

175

CITY OF MALABON

376

8

47

CITY OF NAVOTAS

256

8

32

CITY OF VALENZUELA

608

8

76

CITY OF LAS PIÑAS

512

8

64

CITY OF MAKATI

600

8

75

CITY OF MUNTINLUPA

456

8

57

CITY OF PARAÑAQUE

576

8

72

PASAY CITY

424

8

53

PATEROS

63

3

21

TAGUIG CITY

720

8

90

       

CORDILLERA ADMINISTRATIVE REGION (CAR)

1,653

   

ABRA

252

6

42

BENGUET (excluding BAGUIO CITY)

432

6

72

BAGUIO CITY

360

8

45

IFUGAO

174

6

29

KALINGA

180

6

30

MOUNTAIN PROVINCE

150

6

25

APAYAO

105

3

35

       

REGION I (ILOCOS REGION)

4,608

   

ILOCOS NORTE

594

6

99

ILOCOS SUR

714

6

119

LA UNION

726

6

121

PANGASINAN

2574

6

429

       

REGION II (CAGAYAN VALLEY)

3,198

   

BATANES

24

3

8

CAGAYAN

1062

6

177

ISABELA

1500

6

250

NUEVA VIZCAYA

432

6

72

QUIRINO

180

6

30

       

REGION III (CENTRAL LUZON)

9,476

   

BATAAN

606

6

101

BULACAN

2808

6

468

NUEVA ECIJA

1872

6

312

PAMPANGA (excluding ANGELES CITY)

1728

6

288

ANGELES CITY

336

8

42

TARLAC

1170

6

195

ZAMBALES (excluding OLONGAPO CITY)

528

6

88

OLONGAPO CITY

224

8

28

AURORA

204

6

34

       

REGION IV-A (CALABARZON)

12,378

   

BATANGAS

2148

6

358

CAVITE

3090

6

515

LAGUNA

2868

6

478

QUEZON (excluding LUCENA CITY)

1620

6

270

LUCENA CITY

240

5

48

RIZAL

2412

6

402

       
       

MIMAROPA REGION

2,464

   

MARINDUQUE

222

6

37

OCCIDENTAL MINDORO

384

6

64

ORIENTAL MINDORO

708

6

118

PALAWAN (excluding PUERTO PRINCESA CITY)

654

6

109

PUERTO PRINCESA CITY

232

8

29

ROMBLON

264

6

44

       

REGION V (BICOL REGION)

4,812

   

ALBAY

1086

6

181

CAMARINES NORTE

480

6

80

CAMARINES SUR

1560

6

260

CATANDUANES

264

6

44

MASBATE

738

6

123

SORSOGON

684

6

114

       

REGION VI (WESTERN VISAYAS)

3,998

   

AKLAN

492

6

82

ANTIQUE

528

6

88

CAPIZ

672

6

112

ILOILO (excluding ILOILO CITY)

1764

6

294

ILOILO CITY

392

8

49

GUIMARAS

150

3

50

       

REGION VII (CENTRAL VISAYAS)

5,485

   

BOHOL

1206

6

201

CEBU (excluding the cities of CEBU, LAPU-LAPU, and MANDAUE)

2544

6

424

CEBU CITY

880

8

110

LAPU-LAPU CITY (OPON)

400

8

50

MANDAUE CITY

344

8

43

SIQUIJOR

111

3

37

       

NEGROS ISLAND REGION (NIR)

3,774

   

NEGROS OCCIDENTAL (excluding BACOLOD CITY)

2088

6

348

BACOLOD CITY

480

8

60

NEGROS ORIENTAL

1206

6

201

       

REGION VIII (EASTERN VISAYAS)

4,174

   

EASTERN SAMAR

468

6

78

LEYTE (excluding TACLOBAN CITY)

1626

6

271

TACLOBAN CITY

208

8

26

NORTHERN SAMAR

510

6

85

SAMAR (WESTERN SAMAR)

768

6

128

SOUTHERN LEYTE

438

6

73

BILIRAN

156

6

26

       

REGION IX (ZAMBOANGA PENINSULA)

3,236

   

ZAMBOANGA DEL NORTE

924

6

154

ZAMBOANGA DEL SUR (excluding ZAMBOANGA CITY)

942

6

157

ZAMBOANGA CITY

728

8

91

ZAMBOANGA SIBUGAY

570

6

95

CITY OF ISABELA

72

3

24

       

REGION X (NORTHERN MINDANAO)

4,075

   

BUKIDNON

1140

6

190

CAMIGUIN

75

3

25

LANAO DEL NORTE (excluding ILIGAN CITY)

624

6

104

ILIGAN CITY

312

8

39

MISAMIS OCCIDENTAL

564

6

94

MISAMIS ORIENTAL (excluding CAGAYAN DE ORO CITY)

768

6

128

CAGAYAN DE ORO CITY

592

8

74

       

REGION XI (DAVAO REGION)

4,368

   

DAVAO DEL NORTE

858

6

143

DAVAO DEL SUR (excluding DAVAO CITY)

582

6

97

DAVAO CITY

1520

8

190

DAVAO ORIENTAL

490

6

82

COMPOSTELA VALLEY

636

6

106

DAVAO OCCIDENTAL

282

6

47

       

REGION XII (SOCCSKSARGEN)

3,768

   

COTABATO (NORTH COTABATO)

1146

6

191

SOUTH COTABATO (excluding GENERAL SANTOS CITY)

798

6

133

GENERAL SANTOS CITY (DADIANGAS)

552

8

69

SULTAN KUDARAT

702

6

116

SARANGANI

450

6

75

COTABATO CITY

120

5

24

       

AUTONOMOUS REGION IN MUSLIM MINDANAO (ARMM)

1,812

   

BASILAN (excluding CITY OF ISABELA)

216

6

36

LANAO DEL SUR

360

6

60

MAGUINDANAO (excluding COTABATO CITY)

720

6

120

SULU

366

6

61

TAWI-TAWI

150

6

25

       

REGION XIII (CARAGA)

2,181

   

AGUSAN DEL NORTE (excluding BUTUAN CITY)

288

6

48

BUTUAN CITY

288

8

36

AGUSAN DEL SUR

552

6

92

SURIGAO DEL NORTE

426

6

71

SURIGAO DEL SUR

510

6

85

DINAGAT ISLANDS

117

3

39

 

Replicates are sorted at random so that the first four will be used in the first quarterly Labor Force Survey (LFS) round, the next four in the second LFS round and so on. These replicates are then renumbered consecutively for convenience.

Sample Allocation

At least one (1) sample replicate per sampling domain is required to generate reliable national level estimate, four (4) sample replicates to generate reliable regional level estimate, and sixteen 16 sample replicates to generate reliable province/HUC level estimate. For the Labor Force Survey (LFS), a total of 4 sample replicates are allotted for each round. For other household-based surveys such as: 2016 Annual Poverty Indicator Survey (APIS); 2016 Household Survey on Domestic Visitors (HSDV); and 2016 Model Functional Survey (MFS), only one (1) sample replicate is allotted.  

The total number of sample Secondary Sampling Units (SSUs) are allotted proportionately to the measure of size of the PSU. Thus, a PSU with lesser number of housing units/households would have lesser number of sample SSUs than those PSUs with larger number of housing units/households. On the average, a total of 12 sample Housing Units are allotted for each sample PSUs in Highly Urbanized City domain while 16 sample Housing Units/Households are allotted for every PSUs in province domain.

Sample Allocation of PSUs and SSUs per Domain

Area Number of PSUs formed 1 Sample Replicate (National Level Estimate) 4 Sample Replicates (Regional Level Estimate)
Number of Sample  PSUs Number of Sample Housing Units/ HHs  Number of Sample  PSUs Number of Sample Housing Units/HHs

PHILIPPINES

87,098

735

10,692

2,940

42,768

           

NATIONAL CAPITAL REGION (NCR)

11,638

126

1,512

504

6,048

CITY OF MANILA

1584

8

96

32

384

CITY OF MANDALUYONG

336

8

96

32

384

CITY OF MARIKINA

368

8

96

32

384

CITY OF PASIG

672

8

96

32

384

QUEZON CITY

2576

8

96

32

384

CITY OF SAN JUAN

111

3

36

12

144

CALOOCAN CITY

1400

8

96

32

384

CITY OF MALABON

376

8

96

32

384

CITY OF NAVOTAS

256

8

96

32

384

CITY OF VALENZUELA

608

8

96

32

384

CITY OF LAS PIÑAS

512

8

96

32

384

CITY OF MAKATI

600

8

96

32

384

CITY OF MUNTINLUPA

456

8

96

32

384

CITY OF PARAÑAQUE

576

8

96

32

384

PASAY CITY

424

8

96

32

384

PATEROS

63

3

36

12

144

TAGUIG CITY

720

8

96

32

384

           

CORDILLERA ADMINISTRATIVE REGION (CAR)

1,653

41

624

164

2,496

ABRA

252

6

96

24

384

BENGUET (excluding BAGUIO CITY)

432

6

96

24

384

BAGUIO CITY

360

8

96

32

384

IFUGAO

174

6

96

24

384

KALINGA

180

6

96

24

384

MOUNTAIN PROVINCE

150

6

96

24

384

APAYAO

105

3

48

12

192

           

REGION I (ILOCOS REGION)

4,608

24

384

96

1,536

ILOCOS NORTE

594

6

96

24

384

ILOCOS SUR

714

6

96

24

384

LA UNION

726

6

96

24

384

PANGASINAN

2574

6

96

24

384

           

REGION II (CAGAYAN VALLEY)

3,198

27

432

108

1,728

BATANES

24

3

48

12

192

CAGAYAN

1062

6

96

24

384

ISABELA

1500

6

96

24

384

NUEVA VIZCAYA

432

6

96

24

384

QUIRINO

180

6

96

24

384

REGION III (CENTRAL LUZON)

9,476

58

864

232

3,456

BATAAN

606

6

96

24

384

BULACAN

2808

6

96

24

384

NUEVA ECIJA

1872

6

96

24

384

PAMPANGA (excluding ANGELES CITY)

1728

6

96

24

384

ANGELES CITY

336

8

96

32

384

TARLAC

1170

6

96

24

384

ZAMBALES (excluding OLONGAPO CITY)

528

6

96

24

384

OLONGAPO CITY

224

8

96

32

384

AURORA

204

6

96

24

384

           

REGION IV-A (CALABARZON)

12,378

35

540

140

2,160

BATANGAS

2148

6

96

24

384

CAVITE

3090

6

96

24

384

LAGUNA

2868

6

96

24

384

QUEZON (excluding LUCENA CITY)

1620

6

96

24

384

LUCENA CITY

240

5

60

20

240

RIZAL

2412

6

96

24

384

           

MIMAROPA REGION

2,464

38

576

152

2,304

MARINDUQUE

222

6

96

24

384

OCCIDENTAL MINDORO

384

6

96

24

384

ORIENTAL MINDORO

708

6

96

24

384

PALAWAN (excluding PUERTO PRINCESA CITY)

654

6

96

24

384

PUERTO PRINCESA CITY

232

8

96

32

384

ROMBLON

264

6

96

24

384

           

REGION V (BICOL REGION)

4,812

36

576

144

2,304

ALBAY

1086

6

96

24

384

CAMARINES NORTE

480

6

96

24

384

CAMARINES SUR

1560

6

96

24

384

CATANDUANES

264

6

96

24

384

MASBATE

738

6

96

24

384

SORSOGON

684

6

96

24

384

           

REGION VI (WESTERN VISAYAS)

3,998

35

528

140

2,112

AKLAN

492

6

96

24

384

ANTIQUE

528

6

96

24

384

CAPIZ

672

6

96

24

384

ILOILO (excluding ILOILO CITY)

1764

6

96

24

384

ILOILO CITY

392

8

96

32

384

GUIMARAS

150

3

48

12

192

         

REGION VII (CENTRAL VISAYAS)

5,485

39

528

156

2,112

BOHOL

1206

6

96

24

384

CEBU (excluding the cities of CEBU, LAPU-LAPU, and MANDAUE)

2544

6

96

24

384

CEBU CITY

880

8

96

32

384

LAPU-LAPU CITY (OPON)

400

8

96

32

384

MANDAUE CITY

344

8

96

32

384

SIQUIJOR

111

3

48

12

192

           

NEGROS ISLAND REGION (NIR)

3,774

20

288

80

1,152

NEGROS OCCIDENTAL (excluding BACOLOD CITY)

2088

6

96

24

384

BACOLOD CITY

480

8

96

32

384

NEGROS ORIENTAL

1206

6

96

24

384

           

REGION VIII (EASTERN VISAYAS)

4,174

44

672

176

2,688

EASTERN SAMAR

468

6

96

24

384

LEYTE (excluding TACLOBAN CITY)

1626

6

96

24

384

TACLOBAN CITY

208

8

96

32

384

NORTHERN SAMAR

510

6

96

24

384

SAMAR (WESTERN SAMAR)

768

6

96

24

384

SOUTHERN LEYTE

438

6

96

24

384

BILIRAN

156

6

96

24

384

           

REGION IX (ZAMBOANGA PENINSULA)

3,236

29

420

116

1,680

ZAMBOANGA DEL NORTE

924

6

96

24

384

ZAMBOANGA DEL SUR (excluding ZAMBOANGA CITY)

942

6

96

24

384

ZAMBOANGA CITY

728

8

96

32

384

ZAMBOANGA SIBUGAY

570

6

96

24

384

CITY OF ISABELA

72

3

36

12

144

REGION X (NORTHERN MINDANAO)

4,075

43

624

172

2,496

BUKIDNON

1140

6

96

24

384

CAMIGUIN

75

3

48

12

192

LANAO DEL NORTE (excluding ILIGAN CITY)

624

6

96

24

384

ILIGAN CITY

312

8

96

32

384

MISAMIS OCCIDENTAL

564

6

96

24

384

MISAMIS ORIENTAL (excluding CAGAYAN DE ORO CITY)

768

6

96

24

384

CAGAYAN DE ORO CITY

592

8

96

32

384

           

REGION XI (DAVAO REGION)

4,368

38

576

152

2,304

DAVAO DEL NORTE

858

6

96

24

384

DAVAO DEL SUR (excluding DAVAO CITY)

582

6

96

24

384

DAVAO CITY

1520

8

96

32

384

DAVAO ORIENTAL

490

6

96

24

384

COMPOSTELA VALLEY

636

6

96

24

384

DAVAO OCCIDENTAL

282

6

96

24

384

           

REGION XII (SOCCSKSARGEN)

3,768

37

540

148

2,160

COTABATO (NORTH COTABATO)

1146

6

96

24

384

SOUTH COTABATO (excluding GENERAL SANTOS CITY)

798

6

96

24

384

GENERAL SANTOS CITY (DADIANGAS)

552

8

96

32

384

SULTAN KUDARAT

702

6

96

24

384

SARANGANI

450

6

96

24

384

COTABATO CITY

120

5

60

20

240

           

AUTONOMOUS REGION IN MUSLIM MINDANAO (ARMM)

1,812

30

480

120

1,920

BASILAN (excluding CITY OF ISABELA)

216

6

96

24

384

LANAO DEL SUR

360

6

96

24

384

MAGUINDANAO (excluding COTABATO CITY)

720

6

96

24

384

SULU

366

6

96

24

384

TAWI-TAWI

150

6

96

24

384

           

REGION XIII (CARAGA)

2,181

35

528

140

2,112

AGUSAN DEL NORTE (excluding BUTUAN CITY)

288

6

96

24

384

BUTUAN CITY

288

8

96

32

384

AGUSAN DEL SUR

552

6

96

24

384

SURIGAO DEL NORTE

426

6

96

24

384

SURIGAO DEL SUR

510

6

96

24

384

DINAGAT ISLANDS

117

3

48

12

192

Sample Selection

At the first stage, PSUs are systematically selected from the Master Sample PSU frame of each sampling domain with equal probability. During the second stage of selection, housing units are drawn systematically for each sample PSUs.

Estimation Procedure

The base weight is computed as the inverse of selection probability

For housing units with at most 3 households the base weight is computed as

For housing units with more than 3 households the base weight is computed as


The base weight is adjusted for unit non-response and further calibrated to conform to the known or projected 2016 population count.

Base Weight Adjustment

For unit non-response adjustment (within domain p), the adjustment is computed as:

Applying this to the base weight, we have:

Further adjustment (calibration) is made to conform with known population count, as follows:

Estimation of Total

  • Generally, the estimate for the weighted total for a sampling domain (province/HUC) considering l number of sample replicates is:
  • For each of the sampling domain considering 4 sample replicates are used (.e.g, Labor Force Survey round), the estimate for the weighted total is:
  • For other household-based surveys (e.g. APIS, HSDV, MFS) , considering only 1 sample replicate is used, the estimate for the weighted province/city total is:
  • For the region

    The estimate for the weighted total for the region is the sum of its weighted provinces/HUCs domain totals:
  • For the entire country

Replacing Ineligible Sample Household

 

Replacement sample will be made available together with the list of samples. We allocate at most 3 sample household replacement per sample PSU. We replace only those at the time of the survey are found to be ineligible.

A household is considered not eligible for the survey under any of the following cases:

  • • Vacant housing unit
  • • Housing unit destroyed/demolished
  • • Address not a housing unit (there is no housing unit in the given address)
  • • Others
        
    • • Had permanently moved out of the housing unit
    •   
    • • Had merged with another household in the same housing unit
    •   
    • • Not a permanent resident of the housing unit
    •   
    • • The single-person household occupying the housing unit had passed away