diff --git a/src/NPNSEstimator.jl b/src/NPNSEstimator.jl
index b61e96c..7206807 100644
--- a/src/NPNSEstimator.jl
+++ b/src/NPNSEstimator.jl
@@ -39,7 +39,7 @@ function _get_rate_predictors(rt,df)
     return prd
 end
 
-function StatsBase.fit(::Type{E}, formula::FormulaTerm, df::DataFrame, rt::RateTables.AbstractRateTable) where {E<:NPNSEstimator}
+function StatsBase.fit(::Type{E}, formula::FormulaTerm, df::DataFrame, rt::RateTables.AbstractRateTable) where {E<:Union{NPNSEstimator, Nessie}}
     rate_predictors = _get_rate_predictors(rt,df)
     formula_applied = apply_schema(formula,schema(df))
 
diff --git a/src/Nessie.jl b/src/Nessie.jl
index 3ba5be2..86f917b 100644
--- a/src/Nessie.jl
+++ b/src/Nessie.jl
@@ -1,41 +1,93 @@
-function Nessie(formula::FormulaTerm, df::DataFrame, rt::RateTables.AbstractRateTable)
-    formula_applied = apply_schema(formula,schema(df))
-    rate_predictors = String.([RateTables.predictors(rt)...])
-
-    nms = StatsModels.termnames(formula_applied.rhs)
-    if isa(nms, String)
-        pred_names = [nms]
-    else
-        pred_names = nms
+struct Nessie
+    expected_sample_size::Vector{Float64}
+    expected_life_time::Float64
+    grid::Vector{Float64}
+    function Nessie(T, Δ, age, year, rate_preds, ratetable)
+        grid = mk_grid([1,maximum(T)],1)
+        # grid = mk_grid(T,1)
+        expected_sample_size = zero(grid)
+        for i in eachindex(age)
+            # Tᵢ = searchsortedlast(grid, T[i])
+            Λₚ = 0.0
+            rtᵢ = ratetable[rate_preds[i,:]...]
+            for j in 1:(length(grid)-1)
+                λₚ  = daily_hazard(rtᵢ, age[i] + grid[j], year[i] + grid[j])
+                ∂Λₚ = λₚ * (grid[j+1]-grid[j]) # λₚ * ∂t 
+                Λₚ += ∂Λₚ
+                Sₚ  = exp(-Λₚ)
+                expected_sample_size[j] += Sₚ
+            end
+        end
+        expected_life_time = sum(expected_sample_size[1:(end-1)] .* diff(grid)) / length(age)
+
+        annual_indices = [searchsortedlast(grid, i) for i in (365.241 * (0:floor(maximum(T)/365.241))).+1]
+        return new(expected_sample_size[annual_indices], expected_life_time / 365.241, grid[annual_indices])
     end
+end
 
-    times = sort(unique(floor.(df.time ./ 365.241)))
-    times = unique([0.0; times])
+"""
+    nessie(formula, data, ratetable)
 
-    times_d = times .* 365.241
+bla bla
 
-    new_df = groupby(df, pred_names)
-    povp = zeros(nrow(unique(df[!,pred_names])))
-    sit = zeros(length(times))
-    num_pop = zeros(nrow(unique(df[!,pred_names])), length(times))
+"""
+function nessie(args...)
+    r = fit(Nessie,args...)
+    transform!(r, :estimator => ByRow(x-> (x.grid, x.expected_life_time, x.expected_sample_size)) => [:expected_sample_size,:expected_life_time, :grid])
+    select!(r, Not(:estimator))
 
-    for i in 1:nrow(unique(df[!,pred_names]))
-        for j in 1:nrow(new_df[i])
-            Tᵢ = searchsortedlast(times_d, new_df[i].time[j])
-            rate_preds = select(new_df[i],rate_predictors)
-            rtᵢ = rt[rate_preds[j,:]...]
-            Λₚ = 0.0
+    lt = deepcopy(r)
+    select!(lt, Not([:expected_sample_size, :grid]))
 
-            for m in 1:Tᵢ
-                λₚ          = daily_hazard(rtᵢ, new_df[i].age[j] + times_d[m], new_df[i].year[j] + times_d[m])
-                ∂Λₚ         = λₚ 
-                Λₚ         += ∂Λₚ
-                Sₚ          = exp(-Λₚ)
-                num_pop[i,m] += Sₚ 
-                sit[m]     += (1-Sₚ) / λₚ
-            end
-        end  
-        povp[i] = mean(sit ./ 365.241)     
-    end
-    return num_pop, povp
-end
\ No newline at end of file
+    select!(r, Not(:expected_life_time))
+    return lt, r
+end
+
+
+expected_life_time(x::Nessie) = x.expected_life_time
+expected_sample_size(x::Nessie) = x.expected_sample_size
+
+
+
+
+# function old_Nessie(formula::FormulaTerm, df::DataFrame, rt::RateTables.AbstractRateTable)
+#     formula_applied = apply_schema(formula,schema(df))
+#     rate_predictors = String.([RateTables.predictors(rt)...])
+
+#     nms = StatsModels.termnames(formula_applied.rhs)
+#     if isa(nms, String)
+#         pred_names = [nms]
+#     else
+#         pred_names = nms
+#     end
+
+#     times = sort(unique(floor.(df.time ./ 365.241)))
+#     times = unique([0.0; times])
+
+#     times_d = times .* 365.241
+
+#     new_df = groupby(df, pred_names)
+#     povp = zeros(nrow(unique(df[!,pred_names])))
+#     sit = zeros(length(times))
+#     num_pop = zeros(nrow(unique(df[!,pred_names])), length(times))
+
+#     for i in 1:nrow(unique(df[!,pred_names]))
+#         for j in 1:nrow(new_df[i])
+#             Tᵢ = searchsortedlast(times_d, new_df[i].time[j])
+#             rate_preds = select(new_df[i],rate_predictors)
+#             rtᵢ = rt[rate_preds[j,:]...]
+#             Λₚ = 0.0
+
+#             for m in 1:Tᵢ
+#                 λₚ          = daily_hazard(rtᵢ, new_df[i].age[j] + times_d[m], new_df[i].year[j] + times_d[m])
+#                 ∂Λₚ         = λₚ * 365.241
+#                 Λₚ         += ∂Λₚ
+#                 Sₚ          = exp(-Λₚ)
+#                 num_pop[i,m] += Sₚ 
+#                 sit[m]     += (1-Sₚ) / λₚ
+#             end
+#         end  
+#         povp[i] = mean(sit ./ 365.241)     
+#     end
+#     return num_pop, povp
+# end
\ No newline at end of file
diff --git a/src/NetSurvival.jl b/src/NetSurvival.jl
index 02fabda..5197429 100644
--- a/src/NetSurvival.jl
+++ b/src/NetSurvival.jl
@@ -14,6 +14,8 @@ using RateTables
 include("fetch_datasets.jl")
 include("Surv_and_Strata.jl")
 
+include("Nessie.jl")
+
 include("NPNSEstimator.jl")
 include("PoharPerme.jl")
 include("EdererI.jl")
@@ -22,13 +24,13 @@ include("Hakulinen.jl")
 
 include("CrudeMortality.jl")
 
-include("Nessie.jl")
+
 
 include("GraffeoTest.jl")
 
 export PoharPerme, EdererI, EdererII, Hakulinen
 export CrudeMortality
-export Nessie
+export Nessie, nessie
 export fit, confint
 export GraffeoTest
 export Surv, Strata