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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