RDP 2011-01: Estimating Inflation Expectations with a Limited Number of Inflation-indexed Bonds Equation

{(φ_{k})}_{j, i} = {\begin{array}{l} H 1_{k, j} (χ_{i}) & i = 0, \dots, 2 L, & j = 1, \dots, m_{k} \\ H 2_{k, j} (χ_{i}) & i = 0, \dots, 2 L, & j = m_{k} + 1, \dots, m_{k} + n_{k} . \end{array}